Image forming apparatus

An image forming apparatus comprising:

• a rotary which is rotatable and to which a cartridge is detachably attached, the rotary being rotatable to a replacement posture in which detachment of the cartridge is allowed;
• a drive source;
• a transmission device;
• a moving device configured to be driven by driving force of the drive source transmitted via the transmission device to move the cartridge, with respect to the rotary, between an attached position and a retracted position retracted from the attached position, the moving device including a driven portion that is provided in the rotary and is configured to receive the driving force from the transmission device in a state in which the rotary is in the replacement posture;
• and
• a locking mechanism capable of taking a locking state in which the locking mechanism restricts a rotation of the rotary and a lock releasing state in which the locking mechanism allows the rotation of the rotary, the locking mechanism being configured to take the locking state in a state in which the rotary is in the replacement posture.