[Task] A type of catheters connected to an MDU can be determined without adding any special hardware.[Means for Resolution] There is provided an imaging apparatus for diagnosis which has a motor drive unit (MDU) for being connected to a catheter and for moving and rotating an imaging core accommodated in the catheter along a longitudinal direction of the catheter, and which generates a vascular optical coherence tomographic image and an ultrasound tomographic image of a subject, based on a signal output from the catheter. The apparatus includes a first drive unit that applies an ultrasound drive signal to an ultrasound transceiver accommodated in a distal portion of an imaging core, and that acquires an electric signal indicating a reflected wave, assuming that the catheter is connected to the MDU, a first inspection unit that inspects the presence or absence of the ultrasound transceiver, based on intensity distribution of the electric signal of the reflected wave which is obtained by the first drive unit, a second drive unit that supplies light to an optical transceiver accommodated in the distal portion of the imaging core, and that acquires an electric signal indicating interference light, assuming that the catheter is connected to the MDU, a second inspection unit that generates line image data in a radial direction, regarding a position of the imaging core as an origin, based on the electric signal of the interference light which is obtained by the second drive unit, and that inspects the presence or absence of the optical transceiver, based on pixel data distribution within a predetermined range from a position of the origin, and a determination unit that determines whether the catheter connected to the MDU is any one of the catheter dedicated to diagnosis of the ultrasound tomographic image, the catheter dedicated to diagnosis of the optical coherence tomographic image, and the catheter corresponding to both the ultrasound tomographic image and the optical c
