Machine tool apparatus

A machine tool apparatus for machining a machining object using a tool by controlling the relative position between the tool and said machining object, which machining object is held in a jig, the machine tool apparatus comprising:

• said jig comprises at least a first jig disposed in a machining position of said machining object disposed inside a case of said machine tool apparatus, and a second jig which is moveably configured so as to be separate from said at least first jig and in which second jig said machining object is detachably held;
• the at least first jig and the second jig have a mounting and dismounting device for detachably mounting said second jig on the at least first jig, and said second jig is provided with a handle for gripping when the second jig is to be moved;
• said case is provided with an aperture for loading and unloading said second jig between the exterior of said case to said machining position, a guidance pathway for moving and guiding said second jig in substantially the horizontal direction is provided between at least said machining position and said aperture, and said second jig can be moved along said guidance pathway in a state in which said handle is held, wherein said guidance pathway includes an elevator rail member that slopes downward towards the machining position and that is supported on the at least first jig for elevating and lowering said second jig.