A photosensitive unit includes a rotatable photosensitive member, a frame, a charging roller, an urging portion, a rotary member, a separation member, an abutting portion, and an abutted portion. The separation member includes an engagement portion capable of engaging with the rotary member. The separation member is configured to hold the charging roller at a separation position in a state in which the engagement portion is engaged with the rotary member. The abutting portion is provided on the separation member. The abutted portion is provided on the frame and is abutted by the abutting portion in a case in which the separation member moves in a direction to increase a distance between a swing center of the separation member and a rotation center of the rotary member in a state in which the engagement portion is engaged with the rotary member.