Image forming apparatus and rotating body unit

A rotating body unit for being mounted in an apparatus main body, the apparatus main body being provided with a drive source that is configured to generate drive force and a drive member that is configured to receive drive force transmitted from the drive source and to be driven to rotate upon receiving the drive force, the drive member having a drive-member side contact part, the rotating body unit comprising;

• a rotating body that has a follower member, the follower member being arranged to confront the drive member in an axial direction of the drive member if the rotating body unit is mounted in the apparatus main body, the follower member having a follower-member side contact part;
• and
• a movable drive transmitting member that is formed with an opening to allow the follower-member side contact part of the follower member to be in direct contact with the drive-member side contact part of the drive member, the direct contact of the follower-member side contact part with the drive-member side contact part being maintained due to an urging force generated by an urging member that is provided in the apparatus main body,
• the movable drive transmitting member being configured to transmit drive force from the drive member to the follower member by coupling the drive member and the follower member with each other, and being movably disposed such that the movable drive transmitting member moves relative to the drive member and the follower member on a plane perpendicular to the axial direction of the drive member when the follower-member side contact part is in direct contact with the drive-member side contact part.