cutting unit for agricultural harvesting machines such as trailers or baler for harvesting agricultural stalk or blattgut with the channel (5).in the majority of at least in a series arranged in a schneidstellung in the channel (5) hineinragenden anomalies schneidmessern (11) with an upper (14) and a lower planseite (15), at least one umfangsseitig preferably serrated edge (17) showwith a f u00f6rderzinken (8) f u00f6rderorgan bearing (7) in order to stalk gutzerkleinerung interaction with the cutting blades (11) in the area of the cutting edge (17) in such a angeformte exhibit wave like oberfl u00e4chenkontur unilaterally, that in this area the thickness radially to a u u00dfen to cut (17) keilf u00f6rmig reduces, and thethe area of an oberfl u00e4chenkontur (16) opposite the area on the other side of cutting blades (11) in the connection of a randseitigen nachschleiffl u00e4che (18) so formed is that the wedge shape in this area by at least approximately lifted.