An ophthalmologic observation apparatus of a confocal laser scanning microscopy system for photographing and observing a target site of an eye of an examinee, the apparatus comprising: a laser source (1) that emits a laser beam for a predetermined time in order to obtain a motion image of the target site； a polygon mirror (7) that rotates for a predetermined time at a predetermined speed, reflects the laser beam and scans in a first direction； a galvano mirror (9) that moves for a predetermined time at a predetermined speed, reflects the laser beam and scans in a second direction orthogonal to the first direction； a photoreceptor element (15) that receives the laser beam reflected at the target site； image forming means (33) that forms the motion image of the target site based on photo-receiving signals of the photoreceptor element； display means (34) that displays the formed motion image； a light source (11a) that emits to the polygon mirror, detecting light of a wavelength that is different from a wavelength of the laser beam； a photo sensor (11b) that receives the detecting light reflected by the polygon mirror； and control means (30) that, based on the number of image lines of one frame of the motion image to be displayed, the number of reflection faces of the polygon mirror, and a detection result of the photo sensor, controls the galvano mirror and the image forming means so as to form each image line of each frame of the motion image based on the photo-receiving signals of the laser beam reflected on same reflection face of the polygon mirror.
