To provide an optical tomographic image with suitable image quality according to a user's purpose which is capable of changing a rotation speed of a probe.

In an optical tomographic image acquisition apparatus, an optical probe rotates for scanning to obtain a reflected signal from a measured subject, and an optical tomographic image of the measured subject is formed based on the obtained reflected signal, and the optical tomographic image acquisition apparatus is provided and characteristically including rotation speed changing means which changes the rotation speed of the optical probe in a plurality of stages.