Hydraulic excavator

A hydraulic excavator comprising:

• a lower track structure;
• an upper swing structure swingably attached to an upper portion of the lower track structure;
• a front work device attached to the upper swing structure;
• an operation device that operates operation targets including the lower track structure, the upper swing structure, and the front work device;
• a lock lever switched to one of a lock position that disables an operation of the operation targets by the operation device and a lock release position that permits the operation of the operation targets by the operation device;
• a camera that is attached to the upper swing structure and records a video of surroundings of the upper swing structure, the video including time series data of still images recorded by the camera;
• a controller configured to detect a presence or absence of an obstacle around the upper swing structure based on a luminance change in each pixel of each still image recorded by the camera;
• and
• a notifying device that makes a notification that the obstacle is detected when the controller detects the obstacle, wherein
• the controller is configured to permit the notification by the notifying device when the lock lever is at the lock release position and when the operation device is maintained in a non-operating state from a time of a start of the controller and, when the lock lever is at the lock release position and when the operation device is changed from an operating state to a non-operating state, permit the notification by the notifying device upon the non-operating state being continued for a predetermined time.