The present disclosure relates to image forming apparatus capable of preventing damage even when actuator for detecting sheets loaded on sheet tray is rotated beyond acceptable range. A rotation shaft is disposed in the vicinity of a cover rotation portion of a sheet tray that is to be opened and closed. The image forming apparatus includes a connection portion and an actuator rotating in accordance with an amount of loaded sheets. The actuator includes a rotation shaft, a first rotor supported on the rotation shaft, and a second rotor that is rotatably supported by a cylindrical portion coaxial to the rotation shaft. The connection portion is configured to, when the first rotor rotates in a direction away from the sheet placement surface, make contact with, and rotate the second rotor in the same rotation direction, and rotate only the first rotor when the second rotor reaches a predetermined position.