Abstract: The present invention provides a work machine that can improve the accuracy of control to limit the operation of the work device within a predetermined range. The excavator includes a control valve that controls the flow of pressure oil to the boom hydraulic cylinder, multiple pilot solenoid valves that generate and output pilot pressure to operate the control valve, a controller with a limiting function that controls the multiple pilot solenoid valves to restrict the operation of the work device to a predetermined range, anti-drop valves with an anti-drop function to prevent the boom from falling, and solenoid valves that output release pressure to release the anti-drop function of the anti-drop valves. The controller calculates the release pressure for the anti-drop valves based on information related to the limiting function and controls the solenoid valves to output the calculated release pressure to the anti-drop valves as a signal to release the anti-drop function.