The autograph support device includes a supporting member that supports an image carrier having a planar image display surface such that the image display surface that displays a mirror-image image of an image displayed on a planar writing surface is located one side of the normal direction of the writing surface of a writing medium having the writing surface, and a half mirror that is arranged between the writing surface and the image display surface to reflect at least a portion of light from the one side of the nomal direction of the writing surface above and allow a portion of the light to be transmitted therethrough, and the image display surface and the writing surface are arranged at an equal optical distance with a planar mirror surface of the half mirror interposed therebetween.