Additive manufacturing apparatus and additive manufacturing method

An additive manufacturing apparatus for forming an inclined shaped object on an additive target surface of a workpiece to which build material is to be added, the inclined shaped object being a shaped object inclined in an oblique direction oblique with respect to a vertical direction, the additive manufacturing apparatus comprising:

• a material feeder to supply the build material to a machining area of the additive target surface;
• an emitter to emit a laser beam to the machining area to melt the build material;
• and
• control circuitry to control formation of the inclined shaped object by controlling the material feeder and the emitter, wherein
• the control circuitry
• causes a lower bead layer to be stacked, and then causes an upper bead layer to be stacked, the lower bead layer being a bead layer including a first bead and a second bead that are deposited, the upper bead layer being a bead layer including a third bead and a fourth bead that are deposited on a top surface of the lower bead layer, the upper bead layer being stacked by causing the third bead to be formed on the top surface of the lower bead layer, and then causing the fourth bead to be formed at a position where part of a bottom surface of the fourth bead has no contact with the lower bead layer, the fourth bead being in contact with the top surface of the lower bead layer and with a side surface of the third bead.