Image forming apparatus and developer thereof

PURPOSE: An image forming apparatus and a developer thereof are provided to uniformly control the developing layer of an image forming apparatus through a controller of an improved trail method. CONSTITUTION: A developer of an image forming apparatus includes a frame(200), a developing device(140), a supporting member(210), a control member(220) and a bending unit. The frame stores a developer, and a developing device is mounted at the frame and allows the rotation thereof. The supporting member is installed at the frame, and the control member has an end portion that is installed through a trail method. The control unit also includes an end portion fixed to the support member, and the bending unit is bent to reinforce the strength of the supporting member.