A developing cartridge is provided including a first frame on which a photosensitive drum is arranged, a second frame which is pivotably coupled to the first frame, and a developing roller which is coupled to the second frame. A pair of gap maintaining elements configured to facilitate maintenance of a constant developing gap are arranged on both ends of the developing roller. The developing roller and the pair of gap maintaining elements are arranged on the second frame to pivot in a direction opposite to a pivoting direction of the second frame.