An image forming apparatus includes a process cartridge. The process cartridge includes a coupling member having a first end portion, a second end portion, and a connecting portion connecting the first end portion and the second end portion. The second end portion of the coupling member includes at least one pair of projections, with each of the projections includinga facing portion that faces the axis L2, each facing portion being open to the axis L2. A maximum dimension in a direction perpendicular to the axis L2 of at least a part of the connecting portion is smaller than a diameter of an imaginary circle that is tangent to the facing portions of the projections.