The purpose of the invention is to quickly and accurately determine when digging started. A wheel loader comprises a work machine, a lift cylinder 152 that is a hydraulic actuator to drive the work machine, a hydraulic pump 220 that supplies oil to the lift cylinder 152, a lift cylinder bottom pressure detector 252 that detects the pressure of the lift cylinder 152, a control valve 221 that controls the amount of oil supplied to the lift cylinder 152 from the hydraulic pump 220, a vehicle acceleration detector 254 that detects vehicle acceleration in the front-to-rear direction, and a control device 240. The control device 240 determines whether the work machine has started to dig on the basis of the lift cylinder bottom pressure that was detected by the lift cylinder bottom pressure detector 252 and the vehicle acceleration that was detected by the vehicle acceleration detector 254.