WORK MACHINE

A hydraulic excavator 100 includes: operation devices 4b, 4c, 4d, and 4e that output, based on operation by an operator, operation signals to operate a lower travel structure 1, an upper swing structure 2, and a front work implement 3; solenoid valves 23a, 23b, 24a, and 24b that limit the operation signals outputted from the operation devices 4b, 4c, 4d, and 4e; and a controller 20 that controls the solenoid valves 23a, 23b, 24a, and 24b based on detection signals from sensors 14, 15, and 16 that detect objects in the surroundings of a machine body. The detection ranges of the sensors 14, 15, and 16 include a first detection range TR defined based on travel performance of the lower travel structure 1 and a second detection range SW defined to be along a swing radius of a rear end of the upper swing structure 2. As a result, the influence of excessive alarm on the working operator can be reduced while enhancing detection accuracy by setting the detection range according to action range of the work machine.