An image forming apparatus includes a print head to expose a drum to light, a first supporting unit supporting the print head and to move to mounting and extraction positions, a cable to supply a print head driving signal, an abutting portion, and a second supporting unit having a holding unit to hold the cable and to support the first supporting member. When the print head moves to the mounting position from the extraction position in a state where the cable is connected to the print head, the abutting portion abuts on the cable in one area between a holding unit held portion and a print head connected portion and moves the one area in a direction in which the first supporting unit moves to the mounting position to form in the one area a curved area that is warped and curved toward the mounting position from the extraction position.