diff --git a/addons/project/views/project_collaborator_views.xml b/addons/project/views/project_collaborator_views.xml
index b6e1316ec6a..65aef30273a 100644
--- a/addons/project/views/project_collaborator_views.xml
+++ b/addons/project/views/project_collaborator_views.xml
@@ -5,6 +5,10 @@
         <field name="model">project.collaborator</field>
         <field name="arch" type="xml">
             <tree string="Project Collaborators" create="0">
+                <header>
+                    <button name="%(project_share_wizard_action)d" class="btn-primary" type="action" string="Invite Collaborators"
+                            context="{'default_access_mode': 'edit', 'default_project_id': active_id}" display="always"/>
+                </header>
                 <field name="partner_id" options="{'no_create': True}"/>
                 <field name="partner_email"/>
             </tree>
diff --git a/addons/project/wizard/project_share_wizard.py b/addons/project/wizard/project_share_wizard.py
index 0a83e09bfca..d7b39079959 100644
--- a/addons/project/wizard/project_share_wizard.py
+++ b/addons/project/wizard/project_share_wizard.py
@@ -11,7 +11,15 @@ class ProjectShareWizard(models.TransientModel):
 
     @api.model
     def default_get(self, fields):
-        result = super().default_get(fields)
+        # The project share action could be called in `project.collaborator`
+        # and so we have to check the active_model and active_id to use
+        # the right project.
+        active_model = self._context.get('active_model', '')
+        active_id = self._context.get('active_id', False)
+        if active_model == 'project.collaborator':
+            active_model = 'project.project'
+            active_id = self._context('default_project_id', False)
+        result = super(ProjectShareWizard, self.with_context(active_model=active_model, active_id=active_id)).default_get(fields)
         if not result.get('access_mode'):
             result.update(
                 access_mode='read',