SWIVELING WORK MACHINE

To drive a swiveling work machine (1) with use of fuel stored in a fuel cylinder (130). [0002] A swiveling work machine (1) includes a swivel base (2), a prime mover (4) provided on the swivel base (2), a work device (20) provided on the swivel base (2), and a support mechanism (90) to support a fuel cylinder (130) storing fuel for the prime mover (4).