1. A three-dimensional (3D) graphic generation apparatus including: a triangulation unit for generating a two-dimensional (2D) convex closure that contains a 2D graphic and representing the 2D convex closure by a cluster of plural triangles by using outline data of the 2D graphic; a graphic component judgement unit for judging whether each of the triangles generated by the triangulation unit is a component constituting the 2D graphic or not; and a graphic component 2D-to-3D transformation unit for generating side surfaces corresponding to outline data of a graphic formed by a cluster of triangles which have been judged by the graphic component judgement unit as constituting the 2D graphic, thereby generating a 3D graphic.