There is a need for a combine harvester which may enhance the detection precision of a gain culm sensor by reliably bringing grain culms into contact with the grain culm sensor. The combine harvester includes: a harvest frame 11 that receives grain culms cut by a reaping device; a rake-in auger 12 that is disposed within the harvest frame 11 so as to be rotatable about a rotary axis X1 extending in a right/left direction of the harvester body, and that conveys the grain culms inside the harvest frame 11 in a right/left direction of the harvester body and rakes in the grain culms toward the rear of the harvester body; and a feeder 13 that is communicatively connected to a rear wall of the harvest frame 11, and that conveys the grain culms raked in by the rake-in auger 12 toward the rear of the harvester body. A grain culm sensor 25 that detects the presence of the grain culms when coming in contact with the grain culms is disposed at a grain culm feed port 24a in the feeder 13.