Laminated shaping device

A laminated shaping device (100) is provided with: a processing optical system that has an objective lens that transmits processing light, and that irradiates the processing light to a processing position; a measurement illumination unit (8) for supplying illumination light for measuring the size of the formed shaped object (4); a light-receiving element that detects reflected light, which is the illumination light reflected by the shaped object (4); a light-receiving optical system that condenses the reflected light toward a light-receiving element; a calculation unit (50) that calculates the width of the shaped object (4) in a third direction, which is perpendicular to a first direction, which is the direction in which the processing position is moved with respect to the object to be processed (3), and a second direction, which is the direction in which the beads are stacked, by means of a calculation using the detection result of the reflected light from the light-receiving element; and a control unit (51)