Image forming apparatus

An image forming apparatus, comprising:

• a developing portion including a developing roller that is configured to develop an electrostatic latent image formed on an image-carrying member, and a driven-side shaft coupling that is provided on the developing roller;
• a driving-side shaft coupling configured to engage with the driven-side shaft coupling and transmit driving force, via the driven-side shaft coupling, to the developing roller;
• a movement supporting mechanism configured to movably support the developing roller between a developing position and a separated position, wherein the developing position is where the developing roller develops the electrostatic latent image, and the separated position is further from the image-carrying member than the developing position;
• a movement member configured to be movable in a predetermined movement direction;
• a separating member configured to separate, in response to movement of the movement member, the driven-side shaft coupling from the driving-side shaft coupling;
• and
• a displacement member configured to, during separation of the driven-side shaft coupling from the driving-side shaft coupling, apply a force, to the movement supporting mechanism, in an approaching direction that extends from the separated position toward the developing position, and position the developing roller at the developing position, wherein
• when the movement member moves further in the movement direction after the driven-side shaft coupling has separated from the driving-side shaft coupling, the displacement member applies a force, to the movement supporting mechanism, in a separating direction that extends from the developing position toward the separated position, and moves the developing roller from the developing position to the separated position.