the invention relates to a blade of a lawnmower.the knife has at least two of the hochachse (1) around the messerfl u00fcgel (2)),with the messerfl u00fcgel (2) in the radialrichtung (19) au u00dfenseitig each schneidenabschnitt (3) with a fl u00fcgeltiefe (tf)with a leading sharpened cutting edge (4) and a trailing rear edge (5)).the schneidenabschnitt (3) shows the cross section of the messerfl u00fcgels (2) at a cutting edge (4) of the outgoing and the trailing edge (5) current.in the ordinary einbauposition upper contour (21).the upper contour (21) on the basis of the cutting edge (4) at least half of the fl u00fcgeltiefe (tf) by an upper curve (22).where the upper curve (22) and at least kr u00fcmmungsstetig by convex towards the trailing edge (5) increases.the upper curve (22) is at the location of the cutting edge (4) in an entry angle (a) to schnittrichtung (20)with the entry angle (a) in a range from 0 to 5, including including.