A fundus imaging apparatus, comprising: a light source; an optical scanner configured to scan a fundus of a subject's eye with light from the light source; an optical fiber including a plurality of fiber cores consisting of one center core and N pieces of fiber cores, wherein the plurality of fiber cores are bundled into one on an entrance end side of the optical fiber, and the plurality of fiber cores are divided into three or more small bundles consisting of the center core and two or more small bundles of fiber cores on an exit end side of the optical fiber; a light guide system configured to guide the light returning from the fundus to the entrance end side of the optical fiber; a photodetector unit configured to detect light output from each of at least three regions at the exit end side of the optical fiber; and an image forming unit configured to form a first image based on a detection result of light output from a first region of the at least three regions, and a second image based on detection results of light output from two or more regions of the at least three regions other than the first region, wherein the first region is a central region at an entrance end face of the optical fiber and comprises the center core which is arranged on an optical axis of the light guide system, wherein the N pieces of fiber cores are arranged in the two or more small bundles in the two or more other regions other than the first region, the two or more other regions being peripheral divisional regions (F2, F3) at the entrance end face of the optical fiber, wherein the entrance end of the optical fiber is located in a position optically conjugate with the fundus. a light source; an optical scanner configured to scan a fundus of a subject's eye with light from the light source; an optical fiber including a plurality of fiber cores consisting of one center core and N pieces of fiber cores, wherein the plurality of fiber cores are bundled into one on an entrance end side of the optical fiber, and the plurality of fiber cores are divided into three or more small bundles consisting of the center core and two or more small bundles of fiber cores on an exit end side of the optical fiber; a light guide system configured to guide the light returning from the fundus to the entrance end side of the optical fiber; a photodetector unit configured to detect light output from each of at least three regions at the exit end side of the optical fiber; and an image forming unit configured to form a first image based on a detection result of light output from a first region of the at least three regions, and a second image based on detection results of light output from two or more regions of the at least three regions other than the first region, wherein the first region is a central region at an entrance end face of the optical fiber and comprises the center core which is arranged on an optical axis of the light guide system, wherein the N pieces of fiber cores are arranged in the two or more small bundles in the two or more other regions other than the first region, the two or more other regions being peripheral divisional regions (F2, F3) at the entrance end face of the optical fiber, wherein the entrance end of the optical fiber is located in a position optically conjugate with the fundus.