A machine tool including two rotary feed axes (A, C) for controlling the posture of a tool and a linear feed axis (X, Y, Z) for moving the position of a workpiece relative to the tool, the machine tool comprising: a spindle on an end of which the tool is mounted, a spindle head for supporting the spindle so as to be capable of rotating about a spindle axis of rotation (Os), a spindle head support unit for supporting the spindle head so as to be rotatable about a first axis (Oa) extending orthogonal to the spindle axis of rotation (Os), a first rotary feed axis device which is provided on the spindle head support unit and which rotates the spindle head about the first axis (Oa), a saddle which supports the spindle head support unit so as to be rotatable about a second axis (Oc) which is orthogonal to the first axis (Oa) and which intersects the vertical direction at a predetermined inclination angle, a second rotary feed axis device which is provided on the saddle and which rotatably feeds the spindle head support unit about the second rotary axis (Oc), the spindle head support unit comprises a pair of left and right arms (20a, 20b) which are formed on a C-axis rotary feed axis which is supported, so as to be capable of rotating about the second axis (Oc), on a Z-axis slider which is attached to a front surface of the saddle so as to be capable of reciprocating in the vertical direction, characterised in that it further comprises a restricting means for restricting a rotary feed range of the first rotary feed axis device so that the spindle axis of rotation (Os) is not parallel or coincident to the second axis (Oc), wherein the restricting means comprises a stopper formed on the C-axis rotary feed axis so as to be capable of contacting the spindle head or a limit switch arranged on the C-axis rotary feed axis. a spindle on an end of which the tool is mounted, a spindle head for supporting the spindle so as to be capable of rotating about a spindle axis of rotation (Os), a spindle head support unit for supporting the spindle head so as to be rotatable about a first axis (Oa) extending orthogonal to the spindle axis of rotation (Os), a first rotary feed axis device which is provided on the spindle head support unit and which rotates the spindle head about the first axis (Oa), a saddle which supports the spindle head support unit so as to be rotatable about a second axis (Oc) which is orthogonal to the first axis (Oa) and which intersects the vertical direction at a predetermined inclination angle, a second rotary feed axis device which is provided on the saddle and which rotatably feeds the spindle head support unit about the second rotary axis (Oc), the spindle head support unit comprises a pair of left and right arms (20a, 20b) which are formed on a C-axis rotary feed axis which is supported, so as to be capable of rotating about the second axis (Oc), on a Z-axis slider which is attached to a front surface of the saddle so as to be capable of reciprocating in the vertical direction, characterised in that it further comprises a restricting means for restricting a rotary feed range of the first rotary feed axis device so that the spindle axis of rotation (Os) is not parallel or coincident to the second axis (Oc), wherein the restricting means comprises a stopper formed on the C-axis rotary feed axis so as to be capable of contacting the spindle head or a limit switch arranged on the C-axis rotary feed axis.