The invention relates to a cam drive for a valve control of a mixture-lubricated internal combustion engine (2) having a cylinder (14) and a cylinder head (24). In the cylinder head (24) by a pivotable rocker arm (20) actuates a gas exchange valve (23) is arranged. In a cam chamber (3) of the crankshaft (26) of the internal combustion engine (2) is rotatably driven control cam (6), on the cam track (18) is a drag lever (17) rests, which transmits the cam lift on the rocker arm (20). To achieve a safe mixture lubrication, a flow guide element (40) having a flow edge (41) in the annular space (33) between the peripheral wall (32) of the cam space (3) and the maximum flight circle diameter (31) of the cam lobe (7), wherein the flow edge (41) close to the flight circle diameter (31) of the drag lever (17) is adjacent.