To provide a self-propelled work machine doing away with failure or trouble by the covering of dust while obtaining high power without a hitch in the drive of the work machine by obtaining power necessary for the drive of the work machine from external power, capable of using a compact power generator as a power generator used for the drive of a traveling electrohydraulic unit by using the external power for the drive of the work machine, and allowing the reduction of production cost, the simplification of a structure, and the facilitation of maintenance.

In a self-propelled work machine, a jaw crusher 3 is mounted in a vehicle body 1 including traveling devices 2. A traveling hydraulic motor 21 of the traveling devices, an electric motor 31 for the work machine of the jaw crusher 3, a traveling electrohydraulic unit 4 that is a power device of the traveling hydraulic motor, and a traveling power generator 5 that is a power supply of the traveling electrohydraulic unit are mounted in the vehicle body, and the self-propelled work machine includes a cable connection part 6 for external power for supplying power to the electric motor for the work machine.