To enable a user to easily exchange cartridges by improving operability in an image forming apparatus of drawer structure for storing a cartridge P in a moving member (tray) 26 and exchanging the cartridges at a state where the moving member is drawn in front.

An opening/closing member (door) 28 is provided to be movable in the opening/closing direction on the end side in the direction where the moving member goes from an inner position of an apparatus body 100A to a drawing position to the moving member 26, and can move between a closed position and an opened position to an opening 27 of the apparatus body at a state that the moving member 26 is located at the inner position. A releasing means of an engagement means for locking the moving member to the apparatus body operates interlocking with the movement of the opening/closing member, when the opening/closing member is moved to the closed position, holds the engagement means at an engaged state, and when the opening/closing member is moved to the opened position, holds the engagement means at a released state.