A fundus photographing apparatus for obtaining a tomographic image of a fundus of an examinee's eye, comprising: an interference optical system configured to split a light flux output from a light source into measurement light and reference light, and detect an interference state of the measurement light reflected by the fundus of the examinee's eye and the reference light by a detector; an optical scanner disposed in an optical path of the measurement light to scan the fundus of the examinee's eye with the measurement light; a focus detection means having a light receiving element for receiving light including reflected light from the fundus of the examinee's eye, and configured to detect a focus position with respect to the fundus of the examinee's eye based on an output signal from the light receiving element; a first optical member disposed in the optical path of the measurement light; a focus adjustment means that corrects a diopter scale with respect to the examinee fundus by moving the first optical member to the focus position detected by the focus detection means; a second optical member disposed in the optical path of the measurement light or the reference light; and an optical path length adjustment means that adjusts an optical path length difference between the measurement light and the reference light, wherein the optical path length adjustment means is configured to move, as a first automatic optical path length adjustment, the second optical member to a position at which a tomographic image of the examinee's eye is acquired based on an output signal from the detector during the detection of the focus position by the focus detection means, and readjust, as a second automatic optical path length adjustment, the position of the second optical member based on the output signal from the detector after the first optical member is moved to the focus position by the focus adjustment means, characterized in that the fundus photographing apparatus comprises a control unit configured to control the focus adjustment means and the optical path length adjustment means to perform the focus adjustment and the first automatic optical path length adjustment in parallel. an interference optical system configured to split a light flux output from a light source into measurement light and reference light, and detect an interference state of the measurement light reflected by the fundus of the examinee's eye and the reference light by a detector; an optical scanner disposed in an optical path of the measurement light to scan the fundus of the examinee's eye with the measurement light; a focus detection means having a light receiving element for receiving light including reflected light from the fundus of the examinee's eye, and configured to detect a focus position with respect to the fundus of the examinee's eye based on an output signal from the light receiving element; a first optical member disposed in the optical path of the measurement light; a focus adjustment means that corrects a diopter scale with respect to the examinee fundus by moving the first optical member to the focus position detected by the focus detection means; a second optical member disposed in the optical path of the measurement light or the reference light; and an optical path length adjustment means that adjusts an optical path length difference between the measurement light and the reference light, wherein the optical path length adjustment means is configured to move, as a first automatic optical path length adjustment, the second optical member to a position at which a tomographic image of the examinee's eye is acquired based on an output signal from the detector during the detection of the focus position by the focus detection means, and readjust, as a second automatic optical path length adjustment, the position of the second optical member based on the output signal from the detector after the first optical member is moved to the focus position by the focus adjustment means, characterized in that the fundus photographing apparatus comprises a control unit configured to control the focus adjustment means and the optical path length adjustment means to perform the focus adjustment and the first automatic optical path length adjustment in parallel.