diff --git a/app/views/organizations/organization_users/_detail.json.jbuilder b/app/views/organizations/organization_users/_detail.json.jbuilder
index b456b35cd..78040e90e 100644
--- a/app/views/organizations/organization_users/_detail.json.jbuilder
+++ b/app/views/organizations/organization_users/_detail.json.jbuilder
@@ -4,4 +4,11 @@ json.user do
 end
 
 json.team_names user.teams.where("teams.organization_id=?", organization.id).pluck(:nickname)
-json.created_at user.created_on.strftime("%Y-%m-%d")
+join_date =  if user.organization_users.find_by(:organization_id => organization.id).present?
+               user.organization_users.find_by(:organization_id => organization.id).created_at.strftime("%Y-%m-%d")
+             elsif user.members.joins(:project).find_by(project: organization.projects).present?
+               user.members.joins(:project).find_by(project: organization.projects).created_at.strftime("%Y-%m-%d")
+             else
+               user.created_on.strftime("%Y-%m-%d")
+             end
+json.created_at join_date