A harvesting machine is provided with: a crop tank a measuring instrument for measuring the amount of crop stored in the crop tank an unloader device for discharging the crop stored in the crop tank to the outside a device control unit for executing a precision measurement device setting process a measurement control unit having a precision measurement execution unit and a simple measurement execution unit the precision measurement execution unit performing a measurement with the measuring instrument in a precision measurement that involves the precision measurement device setting process the simple measurement execution unit performing a measurement with the measuring instrument in a simple measurement that does not involve the precision measurement device setting process an operation command processing unit for outputting a precision measurement command and a simple measurement command in response to an operation on a manually operated device and a measurement result recording unit for overwriting a recording of a simple measurement result based on a preceding simple measurement command with a precision measurement result based on a subsequent precision measurement command before the unloader device discharges the crop.
