The invention describes a belt pulley (1) for a wet belt application, with a pulley body (2) comprising toothing (5) incorporating teeth (6) on an end face (4) for a toothed belt, and a tooth gap (7) with a tooth gap base (12) is disposed between every two teeth (6), and optionally with at least one flange (3), which is disposed—in the axial direction—on the side of the pulley body (2) and extends beyond the toothing (5) in the radial direction. Grooves (9) are provided in the region of the tooth gap base (12) and/or on an inner surface (8) of the flange (3) facing the toothing (5) for feeding away a lubricant.