An image forming apparatus includes a drive source, an object configured to be driven by the drive source, and a drive transmission mechanism including a driving member, a driven member, an intermediate member, an urging member, and an actuating portion. The intermediate member is configured to move in an axial direction. The intermediate member includes a shaft portion extending in the axial direction, and a positioning portion configured to determine a position of the driven member in a direction orthogonal to the axis. The shaft portion includes a receiving portion configured to receive a force. The receiving portion is positioned inward of the positioning portion in a radial direction of rotation of the intermediate member.