PROBLEM TO BE SOLVED: To achieve support of diagnosis by slit vision for a subject who is a mute.SOLUTION: A diagnosis support apparatus includes: a display part; a display control part; a view point detecting part; and a determination part. The display part includes: a first display area partially intercepted by a plurality of intercepting parts; and second and third display areas not intercepted by the plurality of intercepting parts. The display control part allows the display part to display a first image on the first display area so that the first image passes through the slits between the plurality of intercepting parts, display the first image in one of the second display area and the third area after the first image passes through the slits, and display a second image different from the first image in the other. The view point detecting part detects a view point of a subject in the first display area, the second display area and the third display area. The determination part determines the degree of development disorder on the basis of the detection result for the view points.