An autism diagnosis support device supporting autism diagnosis, the device comprising: (i) an eye-gaze detecting portion adapted to display, on a display portion to be disposed at a position in an eye-gaze direction of a subject, a combination image for sequentially displaying at least two images including a predetermined human image and a predetermined non-human image, and adapted to detect eye-gaze position information on the subject looking at the combination image; (ii) an eye-gaze position information storing portion adapted to store the eye-gaze position information detected by the eye-gaze detecting portion; (iii) an eye-gaze position information displaying portion adapted to display the eye-gaze position information on the subject stored in the eye-gaze position information storing portion; (iv) an eye-gaze position information evaluating portion adapted to evaluate the eye-gaze position information on the subject by comparing the eye-gaze position information on the subject displayed on the eye-gaze position information displaying portion with the eye-gaze position information on the individual with autism and/or the typically developing individual; (v) an evaluation result outputting portion adapted to output an evaluation result obtained by the eye-gaze position information evaluating portion; and (vi) an evaluation result storing portion adapted to store the evaluation result output from the evaluation result outputting portion or the evaluation result obtained by the eye-gaze position information evaluating portion, wherein the predetermined non-human image includes at least one type selected from an appearance prediction image (α), an illusion recognition image (β), and a difference search image (γ), wherein the appearance prediction image (α) is a moving image including a moving body image (α1) that is a picture moving on the display portion under a certain rule, wherein the moving image is not displayed for a predetermined period of time, when the moving body moves off the screen or when a hiding body image (α2), which is another picture displayed on the screen, overlaps the moving body image (α1), so that it seems as if the moving body is disposed behind the hiding body image (α2), and then is redisplayed on the screen, wherein the illusion recognition image (β) is an image formed of pictures including an illusion causing element (β1) and a non-illusion causing element (β2) displayed on the screen of the display portion, and wherein the difference search image (γ) is an image formed of a combination of a plurality of identical pictures (γ1) having the same or similar appearance, and one or several different pictures (γ2) having a shape different from those of the identical pictures, and the identical pictures (γ1) and the different pictures (γ2) are displyed in a mixed manner on the display portion. (i) an eye-gaze detecting portion adapted to display, on a display portion to be disposed at a position in an eye-gaze direction of a subject, a combination image for sequentially displaying at least two images including a predetermined human image and a predetermined non-human image, and adapted to detect eye-gaze position information on the subject looking at the combination image; (ii) an eye-gaze position information storing portion adapted to store the eye-gaze position information detected by the eye-gaze detecting portion; (iii) an eye-gaze position information displaying portion adapted to display the eye-gaze position information on the subject stored in the eye-gaze position information storing portion; (iv) an eye-gaze position information evaluating portion adapted to evaluate the eye-gaze position information on the subject by comparing the eye-gaze position information on the subject displayed on the eye-gaze position information displaying portion with the eye-gaze position information on the individual with autism and/or the typically developing individual; (v) an evaluation result outputting portion adapted to output an evaluation result obtained by the eye-gaze position information evaluating portion; and (vi) an evaluation result storing portion adapted to store the evaluation result output from the evaluation result outputting portion or the evaluation result obtained by the eye-gaze position information evaluating portion, wherein the predetermined non-human image includes at least one type selected from an appearance prediction image (α), an illusion recognition image (β), and a difference search image (γ), wherein the appearance prediction image (α) is a moving image including a moving body image (α1) that is a picture moving on the display portion under a certain rule, wherein the moving image is not displayed for a predetermined period of time, when the moving body moves off the screen or when a hiding body image (α2), which is another picture displayed on the screen, overlaps the moving body image (α1), so that it seems as if the moving body is disposed behind the hiding body image (α2), and then is redisplayed on the screen, wherein the illusion recognition image (β) is an image formed of pictures including an illusion causing element (β1) and a non-illusion causing element (β2) displayed on the screen of the display portion, and wherein the difference search image (γ) is an image formed of a combination of a plurality of identical pictures (γ1) having the same or similar appearance, and one or several different pictures (γ2) having a shape different from those of the identical pictures, and the identical pictures (γ1) and the different pictures (γ2) are displyed in a mixed manner on the display portion.