According to one embodiment, a generation source identifying apparatus and an image forming apparatus capable of identifying a generation source of abnormal sound are provided. The generation source identifying apparatus includes a memory and a processor. The memory is configured to store information on a driving frequency of a plurality of driving mechanisms. The processor is configured to detect an abnormal sound from sound of the plurality of driving mechanisms, determine a generation interval of the abnormal sound, and identify a respective driving mechanism of the plurality of driving mechanisms as a generation source of the abnormal sound based on the generation interval of the abnormal sound and the information stored in the memory.