An endless belt 300 includes an endless belt substrate 10, and a guide member 100 having a rib member 20 and an abutment that is abutted against an edge of the endless belt substrate 10, wherein the abutment of the guide member 100 is abutted against at least one edge surface of the endless belt substrate 10. Further, the guide member 100 may be provided on at least one edge surface of the endless belt substrate 10 with an adhesive layer 30 disposed therebetween. The abutment of the guide member 100 may include a contact surface 41 that contacts the edge surface of the endless belt substrate 10, an extended section 43 that extends beyond the edge of the endless belt substrate 100, and a support surface that contacts one side of the endless belt substrate 10. Moreover, a reinforcing tape 50 may be bonded across the other side of the endless belt substrate 10 and the short width surface of the extended section 43 of the guide member 100.