1. A head mounted display for supporting improvement in an act of moving a body, comprising: an image display unit that transmits external scenery therethrough and forms an image; a body motion detection unit that detects motions of a user and at least a part of a tool bundled with the body; a reference image acquisition unit that accesses a reference image storage unit which stores a reference image used as a reference of the act for each type of act, and acquires one or a plurality of reference images corresponding to a detection result from the body motion detection unit, wherein the acquisition of the one or plurality of reference images are based upon motion of the head of the user and at least one focused part of the body moving image; and a display control unit that causes the image display unit to form the acquired reference image.