Three-dimensional shaping device and method for manufacturing three-dimensional shaped object

A three-dimensional shaping device comprising:

• a plasticizing unit including a screw and configured to plasticize a material by rotation of the screw to generate a plasticized material;
• a stage having a deposition surface on which the plasticized material is deposited;
• a discharge unit having a plurality of nozzles disposed side by side along a first axis parallel to the deposition surface of the stage, and configured to discharge the plasticized material from the plurality of nozzles toward the deposition surface;
• a discharge amount adjustment unit configured to adjust a discharge amount of the plasticized material from each of the plurality of nozzles;
• a moving unit configured to relatively move the discharge unit with respect to the stage along a second axis that is parallel to the deposition surface of the stage and intersects the first axis;
• and
• a control unit, wherein
• the control unit executes, based on a discharge state of the plasticized material from the plurality of nozzles, at least one of a first control of controlling a rotation speed of the screw, a second control of controlling the discharge amount by the discharge amount adjustment unit, and a third control of controlling a relative speed of the discharge unit with respect to the stage, so as to laminate a shaping layer formed of the plasticized material on the stage.