A developing cartridge having a simplified mounting/separation configuration and an image forming apparatus having the same. The image forming apparatus includes a main body, a developing cartridge unit provided in the main body to form an image, a tray unit configured to accommodate the developing cartridge unit and movably mounted in the main body, a first link member movably coupled to the tray unit, and a second link member provided in the main body to be moved simultaneously with the first link member. The first link member includes a pressure piece to press the second link member such that the second link member does not interfere with the developing cartridge unit during movement of the first link member.