Optical coherence tomographic imaging apparatus creating tomographic image of inspection object includes light splitting means for splitting light from light source into a single reference light and a single sample light, optical path length changing means for changing optical path length of the single reference light, reference light splitting means for splitting the single reference light whose optical path length is changed into a plurality of reference lights, sample light splitting means for splitting the single sample light into a plurality of sample lights, irradiation means for irradiating the inspection object by leading the plurality of sample lights thereto, interference signal forming means for combining returning lights of the plurality of the sample lights from the inspection object irradiated by the irradiation means with the plurality of reference lights passed through the reference-light path, and interference signal obtaining means for obtaining an interference signal from the interference signal forming means.
