An ophthalmologic apparatus comprises an optical system that acquires data of an anterior segment of a subject's eye or a fundus of the subject's eye, an imaging unit that images the anterior segment or the fundus, a movement mechanism that moves the subject's eye and the optical system relative to each other, and a controller that controls die movement mechanism. The controller controls the movement mechanism so as to maintain a positional relationship between the subject's eye and the optical system based on an anterior segment image acquired by the imaging unit in an anterior segment mode for acquiring data of the anterior segment by the optical system, and controls the movement mechanism so as to maintain the positional relationship based on a fundus image acquired by the imaging unit in a fundus mode for acquiring data of the fundus by the optical system.