An image forming device for improving a detachable structure between a body and an image transferring unit is provided to improve the detachable structure by reducing interference generated between the inner side of the main body and consultation paper unit. A first electric connector is equipped in a main body. A consultation paper unit is attached from a main body. The consultation paper unit comprises the second electrical connection. A guide unit(100) guides the consultation paper unit in a side direction and an insertion direction in order to be connected with a first electric connector. A protruding unit(110) is prepared in one among the main body or the consultation paper unit. One or more groove unit(120) controls the protrusion.
