The present invention relates to an agricultural spreader for pneumatic spreading of spreading material such as seed and / or fertilizer, with an upright riser tube (2), which has an open upper end (2o) in a spreader head (1) and a lower end (2u) connected to a supply line (3), which from one side in an obtuse or acute angle leads to the riser tube (2), wherein in the riser tube (2) a deflecting member (10) is provided having a flow guide surface (12) for deflecting the spreading material toward the center of the riser (2).According to the invention the flow guide surface (12) on a side of the supply line (3) facing away from the riser tube (2) forms a portion of the inner surface (2i) of the riser tube (2) or adjoins it and is drawn inwardly in the rise direction, so that a longitudinal central axis (11 ) of the riser tube (2) in the region of the deflecting member (10) with respect to a central perpendicular axis (9) of the spreader head (1 ) and / or with respect to the longitudinal central axis of a riser tube portion above the deflecting member (10) is offset to the side of the supply line (3).
