Abstract: Chopping unit (5) of an agricultural harvesting machine (1), having a chopping drum (10) bearing chopping knives, a first roller pair (11) consisting of an upper and a lower press roller (15) and (16) positioned upstream of the chopping drum (10), at least one second roller pair (12) consisting of a pre-compression roller (13) and a transport roller (14) positioned upstream of the first roller pair (11), a counter-cutting device (18) cooperating with the chopping drum (10) and a stripper device (19) cooperating with the lower press roller (16), arranged between the lower press roller (16) and the chopping drum (10), wherein a rotary shaft (20) of the lower press roller (16) and/or a rotary shaft (21) of the transport roller (14) can be displaced in its relative position to a rotary shaft (17) of the chopping drum (10) at least in the vertical direction.