An image forming apparatus includes an operating portion that moves between a first operating position in which each of positioning members is moved to each of positioning positions and a second operating position in which each of the positioning members is moved to each of releasing positions through each of transmitting members and each of transmitted members when a first transmitting member and a first transmitted member are coupled to each other, and that carries out the movement to a first operating position to move a second positioning member to a second positioning position through a second transmitting member and a second transmitted member and carries out the movement to a second operating position to move the second positioning member to a second releasing position when the first transmitting member and the first transmitted member are decoupled from each other.