Interference between plural processing mechanisms in a dental appliance manufacturing device is suppressed. A dental appliance manufacturing device includes a first cutting processing means, a second cutting processing means, and a control means that controls positions of the first cutting processing means and the second cutting processing means. The control means is capable of causing cutter sections of the first cutting processing means and of the second cutting processing means to contact a cutting workpiece and execute cutting on the cutting workpiece from two sides of the cutting workpiece. The control means also controls such that the cutter section of the second cutting processing means does not move to a position of interference while the cutter section of the first cutting processing means is contacting the cutting workpiece.
