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 acts, 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 a plurality of focused parts of a body moving image; and a display control unit that causes the image display unit to form the acquired reference image, wherein a content of data corresponding to the head of the user and the plurality of focused parts of the body moving image is compared with search keys, and a closest relationship is determined when a sum total of deviations for each focused part is smallest, the closest relationship being used by the reference image acquisition unit to acquire the one or plurality of reference images.