The optical tomography image acquisition device comprises a tomographic image computer (23) that produces tomographic image information about a measurement object, a measurement distance range deviation detector (43) that detects that the distance between a measurement object and the light input/output portion (2) of a probe is outside a measurement distance range on the basis of the computation result of the tomographic image computer (23), and a display controller (44) that outputs the computation result of the tomographic image computer (23) to a display component (17) and also sends the detection result of the measurement distance range deviation detector (43) to the display component (17).
