An evaluation device comprising: a display configured to display at least one evaluation purpose image (F1, F2, F3, G1, G2); a gaze point detecting unit configured to detect positional data of a gaze point of a subject who observes the display; an area setting unit configured to set determination areas (A11 to A17, A21 to A23, A31 to A39) in positions corresponding to the at least one evaluation purpose image (F1, F2, F3, G1, G2) on the display; a determination unit configured to determine, based on the positional data of the gaze point, whether or not the gaze point is present inside each of the determination areas (A11 to A17, A21 to A23, A31 to A39) to define determination values (X to X, X to X, X to X) for determination areas (A11 to A17, A21 to A23, A31 to A39) respectively; an arithmetic unit configured to calculate, based on the determination values (X to X, X to X, X to X) defined by the determination unit, a number of the determination areas (A11 to A17, A21 to A23, A31 to A39) in which the gaze point is present for a predetermined period; and an evaluation unit configured to obtain evaluation data (ANS, ANS1, ANS2) for evaluating a possibility that the subject is a person with a developmental disability based on the number, calculated by the arithmetic unit, of the determination areas (A11 to A17, A21 to A23, A31 to A39) in which the gaze point is present, wherein the evaluation unit is further configured to obtain the value of the evaluation data (ANS, ANS1, ANS2) of the subject based on an equation which calculates a larger value of the evaluation data (ANS, ANS1, ANS2) as the number of the determination areas (A11 to A17, A21 to A23, A31 to A39) in which the gaze point is present becomes larger, and to evaluate that the possibility that the subject is the person with the developmental disability is lower as the value of the evaluation data (ANS, ANS1, ANS2) becomes larger. a display configured to display at least one evaluation purpose image (F1, F2, F3, G1, G2); a gaze point detecting unit configured to detect positional data of a gaze point of a subject who observes the display; an area setting unit configured to set determination areas (A11 to A17, A21 to A23, A31 to A39) in positions corresponding to the at least one evaluation purpose image (F1, F2, F3, G1, G2) on the display; a determination unit configured to determine, based on the positional data of the gaze point, whether or not the gaze point is present inside each of the determination areas (A11 to A17, A21 to A23, A31 to A39) to define determination values (X to X, X to X, X to X) for determination areas (A11 to A17, A21 to A23, A31 to A39) respectively; an arithmetic unit configured to calculate, based on the determination values (X to X, X to X, X to X) defined by the determination unit, a number of the determination areas (A11 to A17, A21 to A23, A31 to A39) in which the gaze point is present for a predetermined period; and an evaluation unit configured to obtain evaluation data (ANS, ANS1, ANS2) for evaluating a possibility that the subject is a person with a developmental disability based on the number, calculated by the arithmetic unit, of the determination areas (A11 to A17, A21 to A23, A31 to A39) in which the gaze point is present, wherein the evaluation unit is further configured to obtain the value of the evaluation data (ANS, ANS1, ANS2) of the subject based on an equation which calculates a larger value of the evaluation data (ANS, ANS1, ANS2) as the number of the determination areas (A11 to A17, A21 to A23, A31 to A39) in which the gaze point is present becomes larger, and to evaluate that the possibility that the subject is the person with the developmental disability is lower as the value of the evaluation data (ANS, ANS1, ANS2) becomes larger.