To provide technology for allowing a compressor for generating compressed air in use for pile driving or boring to be easily carried to a site, completely dispensing with unloading work, and facilitating installation at site.

A compressor body and a passenger body are installed on a common chassis in a longitudinal range. A plurality of wheels are provided for supporting the common chassis in a freely travelling manner. The compressor supported by the chassis for compressing air and an engine for driving the compressor are installed in the compressor body. The compressor body has a connection discharge port for communicating the compressed air generated by the compressor with an external connection pipeline. A travelling engine is installed on the common chassis for driving at least part of the plurality of wheels, and a seat and a wheel steering handle are provided in the passenger body.