Machine tool for non-circular and other machining

A machine tool for non-circular machining comprising a spindle stock which includes a main spindle having a rotational angle control function and a workpiece chuck provided on a distal end portion of the main spindle, a tailstock which is located opposite to a main spindle and provided movably in a direction of the axis of the main spindle, a carriage movable in parallel to the axis of said main spindle, first and second tool rests independently installed on respective cross slides on said carriage, and a numerical control device which effects the rotational angle control function of said main spindle and positioning control of said first and second tool rests, wherein said first and second tool rests move in directions perpendicular to the main spindle axis during machining, and the first tool rest is a tool rest supporting a single type or complex type cutting tool for lathe machining and/or milling of a workpiece, whereas the second tool rest is a tool rest supporting a single type or complex type cutting tool for performing non-circular machining exclusively, the second tool rest having a slider and means for moving the slider in the direction perpendicular to the main spindle axis direction in synchronism with the rotational angle control of the main spindle.