A threshing apparatus to be mounted on a combine is disclosed. The threshing apparatus includes a threshing drum (5a) driven to rotate about a support shaft (38) for effecting a threshing operation on harvested culm fed into a threshing chamber (114). The threshing drum (5a) includes a plurality of bar-like members (147) juxtaposed with a predeterminded spacing therebetween in the peripheral direction of the threshing drum (5a) under a posture along the support shaft (38), support members (144, 146) provided forwardly and rearwardly of the support shaft (38) so as to support the bar-like members, and a plurality of threshing teeth (148) juxtaposed with a predetermined spacing therebetween in the fore/aft direction under a posture projecting from the bar-like members (147) to the outside of the threshing drum (5a).
