Provided is a machine tool (10) for machining a workpiece with a tool (100), wherein the machine tool (10) comprises a holding device for holding the workpiece or the tool (100) for machining the workpiece; a first connector (36) attached to the holding device; a transmission line (26) that transmits at least one of fluid, powder, electricity, and light and includes a second connector (38) connectable to the first connector (36); a housing unit (24) for housing and protecting the transmission line (26); and a transmission line transmission mechanism that transmits the end of the transmission line (26) and switches the transmission line (26) between an expanded state and a retracted state. The transmission line (26) is pulled out of the storage unit (24) in an expanded state and is connected to the holding device through the second connector (38), and is retracted by the storage unit (24) in a retracted state.