SHEET PROCESSING APPARATUS AND IMAGE FORMING APPARATUS HAVING THE SAME

A sheet processing apparatus includes a conveying portion for conveying sheets， a conveying path for sheets， a stack portion for stacking sheets， a first binding portion having a first binding member and moving in a crossing direction crossing to the conveying direction， a first regulating portion which regulates a position of a sheet bundle stacked on the stack portion， a second regulating portion which regulates a position of a sheet bundle stacked on the stack portion， a third regulating portion which regulates a position of a sheet bundle， and a second binding portion which has a second binding member and binds a corner portion of a sheet bundle without a staple. The first binding portion binds a corner portion of a sheet bundle by a staple. The second binding member is located at a downstream of the first binding member in the conveying direction.