diff --git a/app/controllers/api/availabilities_controller.rb b/app/controllers/api/availabilities_controller.rb
index 73f890e30..c059fe0dc 100644
--- a/app/controllers/api/availabilities_controller.rb
+++ b/app/controllers/api/availabilities_controller.rb
@@ -163,10 +163,19 @@ class API::AvailabilitiesController < API::ApiController
   end
 
   def filter_availabilites(availabilities)
-    availabilities.delete_if(&method(:remove_full?))
+    availabilities_filterd = availabilities
+    availabilities_filterd = availabilities.delete_if(&method(:remove_full?)) if params[:dispo] == 'false'
+
+    availabilities_filterd = availabilities.delete_if(&method(:remove_empty?)) if params[:reserved] == 'true'
+
+    availabilities_filterd
   end
 
   def remove_full?(availability)
-    params[:dispo] == 'false' && (availability.is_reserved || (availability.try(:full?) && availability.full?))
+    availability.try(:full?) && availability.full?
+  end
+
+  def remove_empty?(availability)
+    availability.try(:empty?) && availability.empty?
   end
 end
diff --git a/app/frontend/src/javascript/controllers/admin/calendar.js b/app/frontend/src/javascript/controllers/admin/calendar.js
index 36565d417..cb290a790 100644
--- a/app/frontend/src/javascript/controllers/admin/calendar.js
+++ b/app/frontend/src/javascript/controllers/admin/calendar.js
@@ -376,7 +376,8 @@ Application.Controllers.controller('AdminCalendarController', ['$scope', '$state
         machines: isSelectAll('machines', scope),
         spaces: isSelectAll('spaces', scope),
         evt: filter.evt,
-        dispo: filter.dispo
+        dispo: filter.dispo,
+        reserved: filter.reserved
       });
       scope.machinesGroupByCategory.forEach(c => c.checked = _.every(c.machines, 'checked'));
       // remove all
@@ -395,7 +396,8 @@ Application.Controllers.controller('AdminCalendarController', ['$scope', '$state
       machines: isSelectAll('machines', $scope),
       spaces: isSelectAll('spaces', $scope),
       evt: true,
-      dispo: true
+      dispo: true,
+      reserved: false
     };
 
     // toggle to select all formation/machine
@@ -444,7 +446,7 @@ Application.Controllers.controller('AdminCalendarController', ['$scope', '$state
             return $scope.filterAvailabilities;
           }
         },
-        controller: ['$scope', '$uibModalInstance', 'trainings', 'machines', 'machinesGroupByCategory', 'spaces', 'filter', 'toggleFilter', 'filterAvailabilities', function ($scope, $uibModalInstance, trainings, machines, machinesGroupByCategory, spaces, filter, toggleFilter, filterAvailabilities) {
+        controller: ['$scope', '$uibModalInstance', 'trainings', 'machines', 'machinesGroupByCategory', 'spaces', 'filter', 'toggleFilter', 'filterAvailabilities', 'AuthService', function ($scope, $uibModalInstance, trainings, machines, machinesGroupByCategory, spaces, filter, toggleFilter, filterAvailabilities, AuthService) {
           $scope.trainings = trainings;
           $scope.machines = machines;
           $scope.machinesGroupByCategory = machinesGroupByCategory;
@@ -464,6 +466,8 @@ Application.Controllers.controller('AdminCalendarController', ['$scope', '$state
 
           $scope.filterAvailabilities = filter => filterAvailabilities(filter, $scope);
 
+          $scope.isAuthorized = AuthService.isAuthorized;
+
           return $scope.close = function (e) {
             $uibModalInstance.dismiss();
             return e.stopPropagation();
@@ -476,7 +480,7 @@ Application.Controllers.controller('AdminCalendarController', ['$scope', '$state
       const t = $scope.trainings.filter(t => t.checked).map(t => t.id);
       const m = $scope.machines.filter(m => m.checked).map(m => m.id);
       const s = $scope.spaces.filter(s => s.checked).map(s => s.id);
-      return { t, m, s, evt: $scope.filter.evt, dispo: $scope.filter.dispo };
+      return { t, m, s, evt: $scope.filter.evt, dispo: $scope.filter.dispo, reserved: $scope.filter.reserved };
     };
 
     const availabilitySourceUrl = () => `/api/availabilities?${$.param(getFilter())}`;
diff --git a/app/frontend/src/javascript/controllers/calendar.js b/app/frontend/src/javascript/controllers/calendar.js
index 743da2999..78933ec11 100644
--- a/app/frontend/src/javascript/controllers/calendar.js
+++ b/app/frontend/src/javascript/controllers/calendar.js
@@ -159,7 +159,7 @@ Application.Controllers.controller('CalendarController', ['$scope', '$state', '$
             return $scope.filterAvailabilities;
           }
         },
-        controller: ['$scope', '$uibModalInstance', 'trainings', 'machines', 'machinesGroupByCategory', 'spaces', 'externals', 'filter', 'toggleFilter', 'filterAvailabilities', function ($scope, $uibModalInstance, trainings, machines, machinesGroupByCategory, spaces, externals, filter, toggleFilter, filterAvailabilities) {
+        controller: ['$scope', '$uibModalInstance', 'trainings', 'machines', 'machinesGroupByCategory', 'spaces', 'externals', 'filter', 'toggleFilter', 'filterAvailabilities', 'AuthService', function ($scope, $uibModalInstance, trainings, machines, machinesGroupByCategory, spaces, externals, filter, toggleFilter, filterAvailabilities, AuthService) {
           $scope.trainings = trainings;
           $scope.machines = machines;
           $scope.machinesGroupByCategory = machinesGroupByCategory;
@@ -180,6 +180,8 @@ Application.Controllers.controller('CalendarController', ['$scope', '$state', '$
 
           $scope.filterAvailabilities = filter => filterAvailabilities(filter, $scope);
 
+          $scope.isAuthorized = AuthService.isAuthorized;
+
           return $scope.close = function (e) {
             $uibModalInstance.dismiss();
             return e.stopPropagation();
diff --git a/app/frontend/templates/calendar/filter.html b/app/frontend/templates/calendar/filter.html
index a88ffd769..61253b790 100644
--- a/app/frontend/templates/calendar/filter.html
+++ b/app/frontend/templates/calendar/filter.html
@@ -1,3 +1,17 @@
+<div class="row m-b" ng-if="isAuthorized(['admin', 'manager'])">
+  <h3 class="col-md-8 col-sm-8 col-xs-8 text-black" translate>{{ 'app.shared.calendar.show_reserved_uniq' }}</h3>
+  <div class="col-md-4 col-sm-4 col-xs-4">
+    <input bs-switch
+           ng-model="filter.reserved"
+           type="checkbox"
+           switch-size="small"
+           switch-on-text="{{ 'app.shared.buttons.yes' | translate }}"
+           switch-off-text="{{ 'app.shared.buttons.no' | translate }}"
+           switch-animate="true"
+           ng-change="filterAvailabilities(filter)"
+           switch-animate="true"/>
+  </div>
+</div>
 <div class="row">
   <h3 class="col-md-11 col-sm-11 col-xs-11 text-black" translate>{{ 'app.shared.calendar.show_unavailables' }}</h3>
   <input class="col-md-1 col-sm-1 col-xs-1" type="checkbox" ng-model="filter.dispo" ng-change="filterAvailabilities(filter)">
diff --git a/app/models/availability.rb b/app/models/availability.rb
index 29ca94313..addc96f7d 100644
--- a/app/models/availability.rb
+++ b/app/models/availability.rb
@@ -115,7 +115,7 @@ class Availability < ApplicationRecord
   # check if the reservations are complete?
   # if a nb_total_places hasn't been defined, then places are unlimited
   def full?
-    return false if nb_total_places.blank?
+    return false if nb_total_places.blank? && available_type != 'machines'
 
     if available_type == 'event'
       event.nb_free_places.zero?
@@ -124,6 +124,11 @@ class Availability < ApplicationRecord
     end
   end
 
+  # check availability don't have any reservation
+  def empty?
+    slots.map(&:empty?).reduce(:&)
+  end
+
   def available_places_per_slot(reservable = nil)
     case available_type
     when 'training'
diff --git a/app/models/slot.rb b/app/models/slot.rb
index 7cce52b6a..f6fc13178 100644
--- a/app/models/slot.rb
+++ b/app/models/slot.rb
@@ -23,6 +23,14 @@ class Slot < ApplicationRecord
     end
   end
 
+  def empty?(reservable = nil)
+    if reservable.nil?
+      slots_reservations.where(canceled_at: nil).count.zero?
+    else
+      slots_reservations.includes(:reservation).where(canceled_at: nil).where('reservations.reservable': reservable).count.zero?
+    end
+  end
+
   def duration
     (end_at - start_at).seconds
   end
diff --git a/config/locales/app.shared.en.yml b/config/locales/app.shared.en.yml
index c923aa750..d784640b0 100644
--- a/config/locales/app.shared.en.yml
+++ b/config/locales/app.shared.en.yml
@@ -536,5 +536,6 @@ en:
         spaces: "Spaces"
         events: "Events"
         externals: "Other calendars"
+        show_reserved_uniq: "Show reserved slots only"
       machine:
         machine_uncategorized: "Uncategorized machines"
diff --git a/config/locales/app.shared.fr.yml b/config/locales/app.shared.fr.yml
index e7d3d0bdb..8b950558e 100644
--- a/config/locales/app.shared.fr.yml
+++ b/config/locales/app.shared.fr.yml
@@ -536,5 +536,6 @@ fr:
         spaces: "Espaces"
         events: "Événements"
         externals: "Autres calendriers"
+        show_reserved_uniq: "Voir les créneaux réservés uniquement"
       machine:
         machine_uncategorized: "Machines non classés"
diff --git a/test/models/availability_test.rb b/test/models/availability_test.rb
index 3d2b07c65..ab264e0f5 100644
--- a/test/models/availability_test.rb
+++ b/test/models/availability_test.rb
@@ -15,4 +15,12 @@ class AvailabilityTest < ActiveSupport::TestCase
     assert a.invalid?
     assert a.errors.key?(:machine_ids)
   end
+
+  test 'return empty = true if availability dont have any reservation' do
+    not_reserved = Availability.find(1)
+    assert not_reserved.empty?
+
+    reserved = Availability.find(13)
+    assert_not reserved.empty?
+  end
 end