A tomographic imaging apparatus includes an irradiation unit configured to irradiate with a plurality of measurement light beams, a sensor configured to convert into an electric signal a plurality of combined light beams via an optical imaging system by making return light beams from an inspection target, which are generated due to the plurality of measurement light beams, interfere with reference light beams, an output unit configured to output light beams of a single wavelength based on a wavelength width of the plurality of measurement light beams, and a generation unit configured to generate a tomographic image from an electric signal acquired by the sensor via the imaging optical system, based on a position of the light beam of the single wavelength on the sensor.
