Abstract: An image forming apparatus includes a first endless transfer belt, first extending members, a first transfer electric generator, a secondary transfer unit disposed outboard and at least partially facing the first endless transfer belt, and an ultrasonic vibration generator, including a vibration imparting part from which ultrasonic vibrations is applied to the first endless transfer belt. The secondary transfer unit and the first endless transfer belt form a transfer nip forming a transfer electric field due to a difference in electric potential therebetween. The first transfer electric field generator contacts the first endless transfer belt at a position other than a position disposed opposite the secondary transfer unit. The vibration imparting part contacts the first endless transfer belt at a position intermediate between the first transfer electric field generator and the secondary transfer unit in a direction of rotation of the first endless transfer belt.