1. A tomography apparatus comprising: a tomogram acquisition unit configured to acquire a plurality of tomograms; an analysis unit configured to analyze each of the plurality of tomograms; a tomogram selection unit configured to select a standard tomogram based on the analysis result; and a tomogram position correction unit configured to perform position correction for the plurality of tomograms by using the selected standard tomogram, wherein said tomogram acquisition unit generates a plurality of measurement light beams and captures tomograms by using the respective measurement light beams, and wherein the plurality of measurement light beams are integrally scanned when the tomogram is captured, and at least one of the plurality of measurement light beams is used as a signal for position correction.