MACHINE TOOL WITH TOOL REST

The present invention improves tool arrangement freedom in a machine tool capable of simultaneous machining. A machine tool 1 comprises a main spindle 80, a tool post body 10 provided with a first tool mounting part 21 and a second tool mounting part 22 facing each other with a workpiece W1 inbetween in a predetermined facing direction (X-direction) and configured to be movable in at least the facing direction, and a tool post body driving unit 50 configured to move the tool post body 10 in at least the facing direction. The tool post body comprises a first tool post unit 11 provided with the first tool mounting part 21, a second tool post unit 12 provided with a portion of the second tool mounting part 22 with a relative interval L1 with respect to the first tool post unit 11 in the facing direction kept constant, a third tool post unit 13 provided with the remaining portion of the second tool mounting part with a relative interval L2 with respect to the first tool post unit 11 in the facing direction kept variable; and a relatively-driving unit 30 configured to relatively move the third tool post unit 13 in the facing direction with respect to the first tool post unit 11.