Hydraulic excavator

A hydraulic excavator comprising:

• a hydraulic cylinder driven by a hydraulic fluid delivered from a hydraulic pump;
• a work implement driven by the hydraulic cylinder, the work implement including a bucket;
• and
• a hydraulic excavator side controller that calculates a loaded weight of an object to be worked loaded onto a hauling machine by the work implement,
• wherein the hydraulic excavator side controller
• performs a first determination of determining whether or not the loading work of the object to be worked onto the hauling machine by the hydraulic excavator has been conducted based on posture of the work implement,
• calculates a first load that is a load of the object to be worked loaded in the bucket based on a thrust force of the hydraulic cylinder and a determination result of the first determination,
• receives a result of a second determination from a hauling machine side controller, the result of the second determination determining whether or not the object to be worked is loaded onto the hauling machine by the hydraulic excavator, the hauling machine side controller being included in the hauling machine,
• performs a third determination of determining whether or not the first load is to be integrated based on the result of the second determination received from the hauling machine side controller and the result of the first determination determined by the hydraulic excavator side controller, and
• calculates the loaded weight on the hauling machine by integrating the first load in a case where it is determined by the third determination that the first load is to be integrated, the third determination being performed by the hydraulic excavator side controller.