Image forming unit and image forming apparatus having restricting portion to prevent rotation

An image forming unit contained in a flexible bag and held to allow a cushion member to absorb shock, the image forming unit comprising:

• an image carrier on which an electrostatic latent image is configured to be formed;
• a developing device including a developing unit configured to develop the electrostatic latent image by turning around a turning center and contacting the image carrier;
• a developer accommodating portion that accommodates a developer for use in the developing device;
• and
• a restricting portion that is provided on an outermost portion of the developing device,
• wherein the restricting portion is configured to contact the cushion material so that rotation of the developing device is restricted to maintain contact between a developing roller of the developing device and the image carrier;
• and
• wherein the restricting portion is configured to protrude into the cushion member.