An ophthalmic photographing apparatus arranged to obtain a tomographic image of an examinee's eye, the apparatus comprising an optical system comprising: - an optical coherence tomography system to obtain the tomographic image by an interferometric technique in a non-invasive method including: - a measurement light source emitting measurement light; - a light scanning unit arranged to scan a given portion of the fundus with the measurement light emitted from the measurement light source, and - a photodetector arranged to receive interference light received from the given portion of the fundus and from a reference optical system of the optical coherence tomography system; - a memory; and - a control unit adapted to: (a) perform the scanning with the measurement light a plurality of times in a given scanning region by using the scanning unit to obtain a plurality of tomographic B-scan images of the scanning region; (b) store the tomographic B-scan images in the memory; (c) section each of the tomographic B-scan images at a given width to divide the tomographic images into a plurality of regions relative to the scanning direction with the measurement light; (d) obtain a positional deviation information by detecting a positional deviation between the tomographic B-scan images for each of the divided regions; (e) correct the positional deviation between the tomographic B-scan images for each of the divided regions based on the obtained positional deviation information, and (f) add the corrected tomographic images and average them. - an optical coherence tomography system to obtain the tomographic image by an interferometric technique in a non-invasive method including: - a measurement light source emitting measurement light; - a light scanning unit arranged to scan a given portion of the fundus with the measurement light emitted from the measurement light source, and - a photodetector arranged to receive interference light received from the given portion of the fundus and from a reference optical system of the optical coherence tomography system; - a measurement light source emitting measurement light; - a light scanning unit arranged to scan a given portion of the fundus with the measurement light emitted from the measurement light source, and - a photodetector arranged to receive interference light received from the given portion of the fundus and from a reference optical system of the optical coherence tomography system; - a memory; and - a control unit adapted to: (a) perform the scanning with the measurement light a plurality of times in a given scanning region by using the scanning unit to obtain a plurality of tomographic B-scan images of the scanning region; (b) store the tomographic B-scan images in the memory; (c) section each of the tomographic B-scan images at a given width to divide the tomographic images into a plurality of regions relative to the scanning direction with the measurement light; (d) obtain a positional deviation information by detecting a positional deviation between the tomographic B-scan images for each of the divided regions; (e) correct the positional deviation between the tomographic B-scan images for each of the divided regions based on the obtained positional deviation information, and (f) add the corrected tomographic images and average them. (a) perform the scanning with the measurement light a plurality of times in a given scanning region by using the scanning unit to obtain a plurality of tomographic B-scan images of the scanning region; (b) store the tomographic B-scan images in the memory; (c) section each of the tomographic B-scan images at a given width to divide the tomographic images into a plurality of regions relative to the scanning direction with the measurement light; (d) obtain a positional deviation information by detecting a positional deviation between the tomographic B-scan images for each of the divided regions; (e) correct the positional deviation between the tomographic B-scan images for each of the divided regions based on the obtained positional deviation information, and (f) add the corrected tomographic images and average them.