This combine which reaps culm from a field while traveling and stores in a grain tank 2 grain obtained by threshing the reaped culm is provided with: a yield calculation unit for calculating the unit travel yield i.e. the yield per unit travel distance； a work travel determination unit 53 for determining non harvest work travel which is not accompanied by grain harvesting and harvest work travel which is accompanied by grain harvesting； a harvest map data generation unit 66 for generating harvest map data in which the unit travel yield the travel route traveled in the field and the determination results from the work travel determination unit are associated with each other； and a harvest information recording unit for recording the harvest map data.
