PROBLEM TO BE SOLVED: To provide a threshing device that prevents deformation of a cylindrical part of a threshing cylinder and maintains high threshing performance.SOLUTION: A raking spiral (16A) is provided for raking grain culms and guiding the culms to a cylindrical part (17) on an outer circumferential surface of a raking part (16). Protrusions (68A) and recesses (69A) along the axial direction of the threshing cylinder shaft (12) are alternately formed in the circumferential direction on an outer circumferential surface of the cylindrical part (17). A plate (15) is provided which has multiple threshing teeth (14) set up at predetermined intervals in the axial direction of the threshing cylinder shaft (12) on the outer circumferential surface of the protrusions (68A). A rear end (16D) of the raking spiral (16A) is disposed in the vicinity of the front end of the plate (15).
