There is disclosed an evaluating apparatus for evaluating a manipulation performance of a commodity with operating parts. Three dimensional position and orientation of a first body like an operator's fingertip is detected to virtually display the first body. Also, configuration and functions of operating parts planned to be attached to a commodity are set, and three dimensional position and orientation of a second body like a commodity model having the same external shape as that of the commodity is detected to virtually display the commodity with the operating parts. When a planned area of the second body is manipulated by the first body, a contact of the second body with the first body is detected, and an operating part Po placed at a position corresponding to the planned area is detected. Thereafter, the operating part Po of which an external shape is virtually changed by the manipulation of the first body is displayed according to the configuration and function of the operating part Po. Accordingly, an operator can actually feel a state that the external shape of the commodity is changed when the operator virtually manipulates the commodity, without making the commodity on an experimental basis.