A waste straw conveyer is easily changed in attitude to waste straw conveying attitude and waste straw clogging eliminating attitude. Disclosed is a waste straw conveyer in a combine harvester, wherein a waste straw conveyer for conveying the waste straws subjected to threshing processing from an un-reaped side to an already-reaped side is provided in a waste straw processing unit arranged in the rear of the machine body, a clamp conveying unit for clamping and conveying the root sections of the waste straws and an engaging and conveying unit for engaging and conveying the ear tip sections of the waste straws are provided in the waste straw conveyer, both the conveying units being changeable in attitude to the waste straw conveying attitude and the waste straw clogging eliminating attitude via an attitude change operation body and wherein the attitude change operation body is operable from the rear of the machine body. The worker is capable of operating the attitude change operation body while standing in the rear of the machine body ON the already-reaped side of an agricultural field. In this case and the worker is capable of quickly operating the attitude change operation body even in the middle of reaping work so as to easily eliminate the waste straw clogging since there is no need for or complexity of taking care so as not to trample un-reaped crop stems in the agricultural field.
