PURPOSE: To allow optional machines to be optionally combined and set along a rail so as to facilitate systemization by providing an NC system for controlling machines and an X-Y driving table.

CONSTITUTION: A milling machine 2, a wire cut electric discharge machine 3, a laser machine 4 are disposed along a straight rail 1, and an X-Y driving table 5 for fixing a machined body is laid on a rail 1. A composite machining device for medical material is provided with a driver 8 and a computer 7 for controlling these machines 2-4 and X-Y driving table 5. The fabrication and welding of the machined body 6 on the. table 5 is performed by numeric control while moving the X-Y driving table 5 on the rail 1 and switching the machines in turn.