A hinge profile (2) fixable in a supporting profile (1) intended to be used for a sheet unit e.g. in the form of a door, said supporting profile (1) is in the first place intended to be fastened to a wall. The supporting profile (1) has the form of an U, the legs (3,4) of which are directed towards, envelope and cooperate with two legs (5,6) having an inner friction surface (7) protruding from the hinge profile (2), the supporting profile (1) further having in the same in pairs provided angle-bent fixing profiles (8,9), the front portions (10) of which constitute legs (12,13) with friction surfaces (14), the back portions (11) of the fixing profiles (8,9) are displaceable a short distance from each other by help of at least one adjusting screw (15) at the same time as the front portions (10) are displaced in a transverse direction relatively each other to an adjustable engagement with the friction surface (7) of the hinge profile (2), whereby the hinge profile (2) is fixed into a selected, predetermined position in the supporting profile (1).