To solve problems that there is trouble in superposing the front of a driver's seat on a raising up apparatus to interfer the transmission of an alarm sound over a wide range, limiting an installation site of a horn to a position at a higher level than that of a reaping part, making the alarm sound difficult to be sensed by a receiver in traveling on a road, or the like, in reaping of 3-6 rows after extending the swatch.

A multi-row reaping combine harvester superposes the front of the driver's seat on the reaping part. In the combine harvester, an alarm apparatus of the combine harvester is obtained as follows. The horn 2 provided in front of the driver's seat C when viewed from the front of the lifting and lowering reaping part A is made to face within the width of a tine passage 8 forming the raising apparatus 5. The horn 2 is installed in a position at a high level so as to be visible straight over a raising up case 1 during operation and a sound collection case 10 surrounding the horn 2 is provided. The alarm sound can be transmitted through the tine passage 8 to the front of the machine body even when the reaping part A is lifted.