PROBLEM TO BE SOLVED: To reduce a working load when replacing a component at a functional block unit, and to reduce a human mistake when replaced, in an optical image diagnostic device.SOLUTION: This optical image diagnostic device includes a driving part for controlling rotational drive of a transceiving part, when connected with a probe, a generation part for generating an interference light, and a processing part for generating a tomographic image in an inside of a body cavity, based on the interference light, and the processing part includes a communication means communicated with the generation part, and an acquisition means for acquiring a parameter used for generating the tomographic image by the generation part, via the communication means, when starting up the optical image diagnostic device, and based on a characteristic intrinsic to the generation part, and generates the cross-sectional image, using the parameter acquired by the acquisition means.
