The invention relates to a mouldboard (100) for a plough (200)； wherein said mouldboard in the orientation intended for use in a plough comprises an active surface (2) and a passive surface (4)； wherein said active surface (2) is arranged opposite to said passive surface (4)； wherein said active surface is having an extension in a vertical direction (Y)； wherein said active surface is having an extension in a longitudinal direction (X)； wherein said active surface extending from an upper rim (6) to a lower rim (8) of the mouldboard； wherein said active surface, in a predetermined area (A) thereof, is having a geometry which is configured in such a way that there exist a number of cross-sections (9,9',9") spaced along the mouldboard's extension in the longitudinal direction (X) and intersecting the upper rim (6) of said active surface and the lower rim (8) of said active surface (2) in such a way that each said cross-section (9, 9 ',9") on said active surface (2) in said predetermined area (A) defines a cross-sectional curve (10, 10 ',10")； wherein in respect of each said cross-section and within said predetermined area (A) of said active surface (2), said cross-sectional curve (10, 10', 10") comprises an upper cross-sectional part (12, 12', 12") and a lower cross-sectional part (14, 14 ',14") of said active surface； characterized in that in respect of each said cross-section within said predetermined area (A) of said active surface, said lower cross-sectional part (14, 14', 14") of a particular cross-section is having a smaller curvature (C) than its corresponding upper cross-sectional counterpart (12, 12', 12") of the same cross-section (9,9', 9").
