Abstract: A rigid rectangular cheese mould (1) comprising a bottom (2) and four upright walls (3) heatsealed to each other in their corners. The walls (3) are provided with outwardly diverging drainage slits (4) during injection moulding of the walls.The drainage slits (4) form rows (19) extending in the longitudinal direction of the walls, the drainage slits of one row are staggered with respect to the slits (4) of the other row.The outer side of the cheese mould (1) may be reinforced by reinforcing strips (8) or a reinforcing striplike frame.The inner surface of the wall (3) is provided with whey discharge recessions (5) forming a net structure resembling a cheese net structure comprising first structure ribs (16) and second structure ribs (17). The first ribs (16) extending in the vertical direction of the wall (3) are higher than the second ribs (17) extending in horizontal direction. The height at the intersection point is the height of the first ribs.