A three-dimensional model processing apparatus is provided. The three-dimensional model processing apparatus can more really carry out a processing change of shape, color, and the like with respect to a three-dimensional object being displayed on a display by allowing an operator to operate an object tool in which a position change and an orientation change can be made and an editing tool in which relative distance with respect to the object tool can be changed to relatively move both tools such that the relative position between the object tool and the editing tool is detected to execute processing corresponding to, for example, shape change or color processing determined by the corresponding editing tool, thereby modifying attribute data of the object being displayed.