To provide a self-propelled work machine capable of: driving a work machine, an ancillary device thereof and a travelling device without mounting a power generator on a machine body with no difficulty by taking in hydraulic pressure to drive the travelling device from an external travelling work machine and electric power necessary for the work machine as well as the ancillary device thereof from an external power generator; preventing the power generator from a failure or a trouble caused by being exposed to dust from the work machine; and achieving a reduction in a production cost, simplification of a structure and facilitation of maintenance.

The self-propelled work machine with a work machine 3 mounted on a vehicle body 1 provided with a travelling device 2 has, on a machine body: an external hydraulic pressure taking connector 4 to allow a travelling hydraulic motor 21 of the travelling device 2 to take in hydraulic pressure from an external travelling work machine 5; and an external electric power cable connector 7 to take in necessary electric power.