diff --git a/app/controllers/manager/users_controller.rb b/app/controllers/manager/users_controller.rb
index e80d22404..9e1a9fc54 100644
--- a/app/controllers/manager/users_controller.rb
+++ b/app/controllers/manager/users_controller.rb
@@ -20,5 +20,18 @@ module Manager
 
       head :ok
     end
+
+    def delete
+      user = User.find(params[:id])
+      if !user.can_be_deleted?
+        fail "Impossible de supprimer cet utilisateur car il a des dossiers en instruction"
+      end
+      user.delete_and_keep_track_dossiers(current_administration)
+
+      logger.info("L'utilisateur #{user.id} est supprimé par #{current_administration.id}")
+      flash[:notice] = "L'utilisateur #{user.id} est supprimé"
+
+      redirect_to manager_users_path
+    end
   end
 end
diff --git a/app/models/administrateur.rb b/app/models/administrateur.rb
index 16a41be91..4d4b84d4a 100644
--- a/app/models/administrateur.rb
+++ b/app/models/administrateur.rb
@@ -68,6 +68,6 @@ class Administrateur < ApplicationRecord
   end
 
   def can_be_deleted?
-    dossiers.state_instruction_commencee.none? && procedures.none?
+    dossiers.state_instruction_commencee.none? && procedures.all? { |p| p.administrateurs.count > 1 }
   end
 end
diff --git a/app/models/user.rb b/app/models/user.rb
index 41a4984b3..4838da20d 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -96,6 +96,23 @@ class User < ApplicationRecord
     last_sign_in_at.present?
   end
 
+  def can_be_deleted?
+    dossiers.state_instruction_commencee.empty?
+  end
+
+  def delete_and_keep_track_dossiers(administration)
+    if !can_be_deleted?
+      raise "Cannot delete this user because instruction has started for some dossiers"
+    end
+
+    if can_be_deleted?
+      dossiers.each do |dossier|
+        dossier.delete_and_keep_track(administration)
+      end
+      destroy
+    end
+  end
+
   private
 
   def link_invites!
diff --git a/app/views/manager/administrateurs/show.html.erb b/app/views/manager/administrateurs/show.html.erb
index 34b4b9857..73019d37f 100644
--- a/app/views/manager/administrateurs/show.html.erb
+++ b/app/views/manager/administrateurs/show.html.erb
@@ -36,7 +36,7 @@ as well as a link to its edit page.
     <% if page.resource.invitation_expired? %>
       <%= link_to "renvoyer l'invitation", reinvite_manager_administrateur_path(page.resource), method: :post, class: "button" %>
     <% end %>
-    <%= button_to "supprimer", delete_manager_administrateur_path(page.resource), method: :delete, disabled: !page.resource.can_be_deleted?, class: "button", data: { confirm: "Confirmez-vous la suppression de l'administrateur ?" }, title: page.resource.can_be_deleted? ? "Supprimer" : "Cet administrateur a des dossiers ou des procédures et ne peut être supprimé" %>
+    <%= button_to "supprimer", delete_manager_administrateur_path(page.resource), method: :delete, disabled: !page.resource.can_be_deleted?, class: "button", data: { confirm: "Confirmez-vous la suppression de l'administrateur ?" }, title: page.resource.can_be_deleted? ? "Supprimer" : "Cet administrateur a des dossiers ou des procédures dont il est le seul admin et ne peut être supprimé" %>
   </div>
 
 </header>
diff --git a/app/views/manager/users/show.html.erb b/app/views/manager/users/show.html.erb
index 079866322..ab51789a6 100644
--- a/app/views/manager/users/show.html.erb
+++ b/app/views/manager/users/show.html.erb
@@ -25,13 +25,9 @@ as well as a link to its edit page.
   </h1>
 
   <div>
-    <%= link_to(
-      t("administrate.actions.edit_resource", name: page.page_title),
-      [:edit, namespace, page.resource],
-      class: "button",
-    ) if valid_action?(:edit) && show_action?(:edit, page.resource) %>
-  </div>
+    <%= button_to "supprimer", delete_manager_user_path(page.resource), method: :delete, disabled: !page.resource.can_be_deleted?, class: "button", data: { confirm: "Confirmez-vous la suppression de l'utilisateur ?" }, title: page.resource.can_be_deleted? ? "Supprimer" : "Cet utilisateur a des dossiers dont l'instruction a commencé et ne peut être supprimé" %>
 
+  </div>
   <div>
     <% if !user.confirmed? %>
       <%= link_to('Renvoyer l’email de confirmation', [:resend_confirmation_instructions, namespace, page.resource], method: :post, class: 'button') %>
diff --git a/config/routes.rb b/config/routes.rb
index 293d0d85e..8c7994777 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -25,6 +25,7 @@ Rails.application.routes.draw do
     end
 
     resources :users, only: [:index, :show] do
+      delete 'delete', on: :member
       post 'resend_confirmation_instructions', on: :member
       put 'enable_feature', on: :member
     end
diff --git a/lib/tasks/support.rake b/lib/tasks/support.rake
index 7d96ac8e2..3ad4aee42 100644
--- a/lib/tasks/support.rake
+++ b/lib/tasks/support.rake
@@ -15,13 +15,7 @@ namespace :support do
     user = User.find_by!(email: user_email)
     administration = Administration.find_by!(email: administration_email)
 
-    if user.dossiers.state_instruction_commencee.any?
-      fail "Cannot delete this user because instruction has started for some dossiers"
-    end
-
-    user.dossiers.each do |dossier|
-      dossier.delete_and_keep_track(administration)
-    end
+    user.delete_and_keep_track_dossiers(administration)
     user.destroy
   end
 
diff --git a/spec/controllers/manager/users_controller_spec.rb b/spec/controllers/manager/users_controller_spec.rb
new file mode 100644
index 000000000..9a703a82d
--- /dev/null
+++ b/spec/controllers/manager/users_controller_spec.rb
@@ -0,0 +1,17 @@
+describe Manager::UsersController, type: :controller do
+  let(:administration) { create(:administration) }
+
+  describe '#delete' do
+    let!(:user) { create(:user) }
+
+    before { sign_in administration }
+
+    subject { delete :delete, params: { id: user.id } }
+
+    it 'deletes the user' do
+      subject
+
+      expect(User.find_by(id: user.id)).to be_nil
+    end
+  end
+end
diff --git a/spec/models/administrateur_spec.rb b/spec/models/administrateur_spec.rb
index 4b9fef1f0..9f0c30923 100644
--- a/spec/models/administrateur_spec.rb
+++ b/spec/models/administrateur_spec.rb
@@ -21,6 +21,31 @@ describe Administrateur, type: :model do
     end
   end
 
+  describe "#can_be_deleted?" do
+    subject { administrateur.can_be_deleted? }
+
+    context 'when the administrateur has a dossier in instruction' do
+      let!(:dossier) { create(:dossier, :en_instruction) }
+      let(:administrateur) { dossier.procedure.administrateurs.first }
+
+      it { is_expected.to be false }
+    end
+
+    context "when the administrateur's procedures have other administrateurs" do
+      let!(:administrateur) { create(:administrateur) }
+      let!(:autre_administrateur) { create(:administrateur) }
+      let!(:procedure) { create(:procedure, administrateurs: [administrateur, autre_administrateur]) }
+
+      it { is_expected.to be true }
+    end
+
+    context "when the administrateur has no procedure" do
+      let!(:administrateur) { create(:administrateur) }
+
+      it { is_expected.to be true }
+    end
+  end
+
   # describe '#password_complexity' do
   #   let(:email) { 'mail@beta.gouv.fr' }
   #   let(:passwords) { ['pass', '12pass23', 'démarches ', 'démarches-simple', 'démarches-simplifiées-pwd'] }
diff --git a/spec/models/user_spec.rb b/spec/models/user_spec.rb
index 54eb0dcf3..b127d35c6 100644
--- a/spec/models/user_spec.rb
+++ b/spec/models/user_spec.rb
@@ -209,4 +209,45 @@ describe User, type: :model do
       it { is_expected.to be true }
     end
   end
+
+  describe '#can_be_deleted?' do
+    let(:user) { create(:user) }
+
+    subject { user.can_be_deleted? }
+
+    context 'when the user has a dossier in instruction' do
+      let!(:dossier) { create(:dossier, :en_instruction, user: user) }
+
+      it { is_expected.to be false }
+    end
+
+    context 'when the user has no dossier in instruction' do
+      it { is_expected.to be true }
+    end
+  end
+
+  describe '#delete_and_keep_track_dossiers' do
+    let(:administration) { create(:administration) }
+    let(:user) { create(:user) }
+
+    context 'with a dossier in instruction' do
+      let!(:dossier_en_instruction) { create(:dossier, :en_instruction, user: user) }
+      it 'raises' do
+        expect { user.delete_and_keep_track_dossiers(administration) }.to raise_error
+      end
+    end
+
+    context 'without a dossier in instruction' do
+      let!(:dossier_en_construction) { create(:dossier, :en_construction, user: user) }
+      let!(:dossier_brouillon) { create(:dossier, user: user) }
+
+      it "keep track of dossiers and delete user" do
+        user.delete_and_keep_track_dossiers(administration)
+
+        expect(DeletedDossier.find_by(dossier_id: dossier_en_construction)).to be_present
+        expect(DeletedDossier.find_by(dossier_id: dossier_brouillon)).to be_present
+        expect(User.find_by(id: user.id)).to be_nil
+      end
+    end
+  end
 end