An agricultural round baler, in particular for baling stalk-like harvested material into round bales, comprising: - an interior space surrounded by a housing, - a feeding device, by means of which harvested material can be fed to the interior space through a transfer cross section, - a plurality of guide rollers which extend within the interior space in a transverse direction of the round baler, - a baler belt which is configured in the form of an endless belt and is positioned around the guide rollers in a manner such that it can run around a run path within the interior space, as well as - an adjustment device which comprises at least one adjustment roller extending parallel to the guide rollers, wherein at least one of the guide rollers is configured in the form of a drive roller by means of which the baler belt is driven, wherein along its run path, the baler belt sets up a bale chamber which interacts with the transfer cross section so that harvested material guided into the interior space by means of the feeding device enters the bale chamber, wherein the adjustment roller is positioned along the run path of the baler belt in a manner such that at least one section of run path directly adjacent to the adjustment roller at least partly delimits the bale chamber, wherein the adjustment roller of the adjustment device is movably configured in a manner such that at least a portion of the run path of the baler belt is displaceable, characterized by at least one second adjustment device, the adjustment roller of which, which is operatively connected to the adjustment roller of the first adjustment device, sets up at least a portion of the bale chamber, wherein the adjustment roller of the second adjustment device is movably configured in a manner such that at least a portion of the run path of the baler belt is displaceable within the interior space, wherein at least one of the adjustment devices (9, 14), preferably both adjustment devices (9, 14), has a respective roller pair which comprises two associated adjustment rollers (10, 11, 15, 16), wherein preferably, both adjustment rollers (10, 11, 15, 16) are configured so as to be movable, wherein at least one of the adjustment devices (9, 14), preferably both adjustment devices (9, 14), comprises at least one linear drive which is configured so as to displace the adjustment rollers (10, 11, 15, 16) within the interior space along a straight line, wherein the straight line preferably extends between the adjustment rollers (10, 11, 15, 16) and a fixed deflecting roller (17, 18) associated therewith. - an interior space surrounded by a housing, - a feeding device, by means of which harvested material can be fed to the interior space through a transfer cross section, - a plurality of guide rollers which extend within the interior space in a transverse direction of the round baler, - a baler belt which is configured in the form of an endless belt and is positioned around the guide rollers in a manner such that it can run around a run path within the interior space, as well as - an adjustment device which comprises at least one adjustment roller extending parallel to the guide rollers, wherein at least one of the guide rollers is configured in the form of a drive roller by means of which the baler belt is driven,