diff --git a/app/controllers/new_user/dossiers_controller.rb b/app/controllers/new_user/dossiers_controller.rb
index 4156384bf..1499730c0 100644
--- a/app/controllers/new_user/dossiers_controller.rb
+++ b/app/controllers/new_user/dossiers_controller.rb
@@ -4,9 +4,9 @@ module NewUser
 
     helper_method :new_demarche_url
 
-    before_action :ensure_ownership!, except: [:index, :show, :demande, :messagerie, :brouillon, :update_brouillon, :recherche]
-    before_action :ensure_ownership_or_invitation!, only: [:show, :demande, :messagerie, :brouillon, :update_brouillon, :create_commentaire]
-    before_action :ensure_dossier_can_be_updated, only: [:update_identite, :update_brouillon]
+    before_action :ensure_ownership!, except: [:index, :show, :demande, :messagerie, :brouillon, :update_brouillon, :modifier, :recherche]
+    before_action :ensure_ownership_or_invitation!, only: [:show, :demande, :messagerie, :brouillon, :update_brouillon, :modifier, :create_commentaire]
+    before_action :ensure_dossier_can_be_updated, only: [:update_identite, :update_brouillon, :modifier]
     before_action :forbid_invite_submission!, only: [:update_brouillon]
 
     def index
@@ -123,6 +123,10 @@ module NewUser
       end
     end
 
+    def modifier
+      @dossier = dossier_with_champs
+    end
+
     def merci
       @dossier = current_user.dossiers.includes(:procedure).find(params[:id])
     end
diff --git a/app/views/new_user/dossiers/demande.html.haml b/app/views/new_user/dossiers/demande.html.haml
index cf82b1e3b..f5be19d48 100644
--- a/app/views/new_user/dossiers/demande.html.haml
+++ b/app/views/new_user/dossiers/demande.html.haml
@@ -7,4 +7,4 @@
 
   .container
     - if !@dossier.read_only?
-      = link_to "Modifier le dossier", brouillon_dossier_path(@dossier), class: 'button primary edit-form'
+      = link_to "Modifier le dossier", modifier_dossier_path(@dossier), class: 'button primary edit-form'
diff --git a/app/views/new_user/dossiers/modifier.html.haml b/app/views/new_user/dossiers/modifier.html.haml
new file mode 100644
index 000000000..624dcaa6a
--- /dev/null
+++ b/app/views/new_user/dossiers/modifier.html.haml
@@ -0,0 +1,7 @@
+- content_for(:title, "Modifier · Dossier nº #{@dossier.id} (#{@dossier.procedure.libelle})")
+
+#dossier-show
+  = render partial: 'new_user/dossiers/show/header', locals: { dossier: @dossier }
+
+  .container
+    = render partial: "shared/dossiers/edit", locals: { dossier: @dossier, apercu: false }
diff --git a/config/routes.rb b/config/routes.rb
index ca1701fd0..b5799685e 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -277,6 +277,7 @@ Rails.application.routes.draw do
         patch 'update_identite'
         get 'brouillon'
         patch 'brouillon', to: 'dossiers#update_brouillon'
+        get 'modifier', to: 'dossiers#modifier'
         get 'merci'
         get 'demande'
         get 'messagerie'
diff --git a/spec/features/new_user/dossier_details_spec.rb b/spec/features/new_user/dossier_details_spec.rb
index d416d194a..d6644e634 100644
--- a/spec/features/new_user/dossier_details_spec.rb
+++ b/spec/features/new_user/dossier_details_spec.rb
@@ -25,7 +25,7 @@ describe 'Dossier details:' do
     expect(page).to have_current_path(demande_dossier_path(dossier))
     click_on 'Modifier le dossier'
 
-    expect(page).to have_current_path(brouillon_dossier_path(dossier))
+    expect(page).to have_current_path(modifier_dossier_path(dossier))
     fill_in('texte obligatoire', with: 'Nouveau texte')
     click_on 'Enregistrer les modifications du dossier'
 
diff --git a/spec/views/new_user/dossiers/demande.html.haml_spec.rb b/spec/views/new_user/dossiers/demande.html.haml_spec.rb
index 0f0a15236..0dff42b3d 100644
--- a/spec/views/new_user/dossiers/demande.html.haml_spec.rb
+++ b/spec/views/new_user/dossiers/demande.html.haml_spec.rb
@@ -21,7 +21,7 @@ describe 'new_user/dossiers/demande.html.haml', type: :view do
   end
 
   context 'when the dossier is editable' do
-    it { is_expected.to have_link('Modifier le dossier', href: brouillon_dossier_path(dossier)) }
+    it { is_expected.to have_link('Modifier le dossier', href: modifier_dossier_path(dossier)) }
   end
 
   context 'when the dossier is read-only' do