Smoother and gypsum board manufacturing device

A smoother configured to correct a shape of a molded body of a gypsum slurry by smoothing, the smoother comprising:

• a conveying device for the molded body;
• a pair of arms that are respectively disposed to face both widthwise ends of the conveying device, and in which longitudinal ends of the arms are swingable in upward and downward directions with respect to a conveying surface of the conveying device;
• a smoother plate having a plate-shaped body and being fixed to a pair of facing ends of the longitudinal ends of the pair of arms, the smoother plate configured to contact and smooth a top surface of the molded body with a bottom surface of the plate-shaped body as the molded body is being conveyed under the bottom surface on the conveying surface;
• weights that are respectively attached to the pair of arms and are movable along a longitudinal direction of the arms;
• a weight position changing device configured to change positions of the weights on the arms;
• and
• a first control device configured to control the positions of the weights on the arms via the weight position changing device.