CONSTRUCTION MACHINE

摘要

Provided is a construction machine capable of reducing unpleasant feeling that an operator may experience by adjusting the moving timing of the valve elements of a plurality of lock valves. A hydraulic excavator includes control valves 15A and 15B connected to a head-side chamber of a boom cylinder 8, an operating unit 14 configured to switch the control valves 15A and 15B, lock valves 16A and 16B each provided between the head-side chamber and each of the control valves 15A and 15B, and an operation control unit that controls the operation of the lock valves 16A and 16B. The lock valves 16A and 16B each have a valve element that is configured to move between a locking position at which the discharge of hydraulic oil from the head-side chamber is restricted and an unlocking position at which the discharge of the hydraulic oil from the head-side chamber is allowed. The operation control unit controls the operation of the lock valves 16A and 16B so that the valve elements move from the locking position to the unlocking position at different points in time when the operating unit 14 is operated.