A shaping apparatus employing Directed Energy Deposition that is configured to apply a three-dimensional shaping on a target surface, comprising: a movement system configured to move the target surface; a beam shaping system that has a beam irradiation section including a condensing optical system configured to emit a beam, and a material processing section configured to supply powder shaping material to be irradiated by the beam from the beam irradiation section; and a controller configured to control the movement system and the beam shaping system based on 3D data of a three-dimensional shaped object to be formed, so that the shaping is applied to a target portion on the target surface by supplying the shaping material from the material processing section while relative movement of the target surface and the beam from the beam irradiation section is performed, wherein the beam irradiation section comprises a mirror array, the mirror array and the condensing optical system being sequentially arranged on an optical path of a beam passing through the beam shaping system such that condensing optical system condenses light from the mirror array to emit the beam, and the mirror array being controllable by the controller to change the intensity distribution of the beam within a predetermined plane at an exit surface side of the condensing optical system, and wherein changing of the intensity distribution includes changing at least one of a position of an irradiation area of the beam within the predetermined plane, number of the irradiation areas within the predetermined plane, size of the irradiation areas within the predetermined plane, and shape of the irradiation areas within the predetermined plane. a movement system configured to move the target surface; a beam shaping system that has a beam irradiation section including a condensing optical system configured to emit a beam, and a material processing section configured to supply powder shaping material to be irradiated by the beam from the beam irradiation section; and a controller configured to control the movement system and the beam shaping system based on 3D data of a three-dimensional shaped object to be formed, so that the shaping is applied to a target portion on the target surface by supplying the shaping material from the material processing section while relative movement of the target surface and the beam from the beam irradiation section is performed, wherein the beam irradiation section comprises a mirror array, the mirror array and the condensing optical system being sequentially arranged on an optical path of a beam passing through the beam shaping system such that condensing optical system condenses light from the mirror array to emit the beam, and the mirror array being controllable by the controller to change the intensity distribution of the beam within a predetermined plane at an exit surface side of the condensing optical system, and wherein changing of the intensity distribution includes changing at least one of a position of an irradiation area of the beam within the predetermined plane, number of the irradiation areas within the predetermined plane, size of the irradiation areas within the predetermined plane, and shape of the irradiation areas within the predetermined plane.