An image forming apparatus comprises: a rotary guide member including a guide path and rotating about a supporting shaft and changing the posture thereof in such a manner that the exit of the guide path faces toward any one of at least two conveyance destinations; a motor; a detector for outputting a detection signal when a predetermined posture of the rotary guide member is detected; an instructing section for outputting an instruction signal to the motor to operate the rotary guide member toward the predetermined posture when a predetermined operation is performed to the image forming apparatus; a judging section for judging whether or not the detection signal has been received from the detector in response to the instruction signal by the instructing section this time; and a notifying section for counting a consecutive occurrence number of a judgment result to the effect that no detection signal was received in response to the instruction signal this time when the judging section judged that no detection signal was received in response to the instruction signal this time and giving at least one of a notification prompting an inspection request of the image forming apparatus anda notification relating to prompting of the inspection request when the consecutive occurrence number reaches a set plural number. When the detector does not output the detection signal, the abnormity processing time of the maintenance man is reduced as much as possible.