An agricultural roundbaler includes a housing having a housing part, an ejection flap pivotably mounted on the housing part about a bearing axis, and drivable pressing apparatus arranged on the housing part and the ejection flap. The pressing apparatus define a bale pressing chamber on a peripheral side thereof. A control device operably pivots the ejection flap such that an ejection opening is formed between the housing part and the ejection flap. During an unloading process, the ejection flap is adjustably pivoted by the control device from an unloading position in which the fully pressed round bale is unloaded through the ejection opening to a retained position in which the unloaded round bale is retained by the ejection flap. The ejection flap is pivotable from the retained position to a relieved position in which the retained round bale is released by the ejection flap to eject from the pressing chamber.