Object detecting apparatus mounted on a vehicle includes a transmitting unit, a receiving unit, a measurement unit, a determination unit, a. Transmitting unit intermittently transmits the signal wave to the space around the vehicle. Receiving unit receives a reflected wave from the object. Measuring unit for measuring a distance to an object based on the reflected wave received by the receiver. Determination unit, when the distance measuring unit is measured is within determination distance range, it is determined that the object is abnormally close, counts the number of times the object is determined to be abnormal approach, this number Upon reaching the threshold, it is determined that the abnormality in at least one of the transmitter and receiver occurs.