diff --git a/app/views/instructeurs/procedures/email_usagers.html.haml b/app/views/instructeurs/procedures/email_usagers.html.haml
index c5276ae50..72a54dc77 100644
--- a/app/views/instructeurs/procedures/email_usagers.html.haml
+++ b/app/views/instructeurs/procedures/email_usagers.html.haml
@@ -6,7 +6,7 @@
 .messagerie.container
   - if @email_usagers_dossiers.present?
     %p.notice.mb-2.mt-4 Vous allez envoyer un message à #{pluralize(@dossiers_count, 'personne')} dont les dossiers sont en brouillon, dans les groupes instructeurs : #{@groupe_instructeurs.join(', ')}.
-    = render partial: 'shared/dossiers/messages/form', locals: { commentaire: @commentaire, form_url: create_multiple_commentaire_instructeur_procedure_path(@procedure) }
+    = render partial: 'shared/dossiers/messages/form', locals: { commentaire: @commentaire, form_url: create_multiple_commentaire_instructeur_procedure_path(@procedure), disable_piece_jointe: true }
 
     - if @bulk_messages.present?
       %section.list-avis.mt-8
diff --git a/app/views/shared/dossiers/messages/_form.html.haml b/app/views/shared/dossiers/messages/_form.html.haml
index 4fb1a683b..b07ed4940 100644
--- a/app/views/shared/dossiers/messages/_form.html.haml
+++ b/app/views/shared/dossiers/messages/_form.html.haml
@@ -5,11 +5,13 @@
     - placeholder = t('views.shared.dossiers.messages.form.write_message_placeholder')
   = f.text_area :body, rows: 5, placeholder: placeholder, required: true, class: 'message-textarea persisted-input'
   .flex.justify-between.wrap
+    - disable_piece_jointe = defined?(disable_piece_jointe) ? disable_piece_jointe : false
     %div
-      = f.label :piece_jointe, for: :piece_jointe do
-        = t('views.shared.dossiers.messages.form.attach_dossier')
-        %span.notice= t('views.shared.dossiers.messages.form.attachment_size')
-      = f.file_field :piece_jointe, id: 'piece_jointe', direct_upload: true
+      - if !disable_piece_jointe
+        = f.label :piece_jointe, for: :piece_jointe do
+          = t('views.shared.dossiers.messages.form.attach_dossier')
+          %span.notice= t('views.shared.dossiers.messages.form.attachment_size')
+        = f.file_field :piece_jointe, id: 'piece_jointe', direct_upload: true
 
     %div
       = f.submit t('views.shared.dossiers.messages.form.send_message'), class: 'button primary send', data: { disable: true }