To provide a means as an optical molding method by a powder material molding method to effectively and surely eliminate uncured powder crept in recessed parts of an optically molded article after having been molded, and to prevent the cured parts from being shaved off or damaged when the uncured powder is removed.

Respective layers obtained by slicing a three-dimensional model in parallel into multiple layers are laminated successively to form binding cured layers obtained by irradiation of laser beam to powder material layers. The uncured powder material 3 left in recessed parts of the optically molded article 1 obtained is eliminated by air ejection 4 and/or air suction 5.