Abstract: An improved arrangement in a liquid flow meter which contains at least one cylindrical measuring means rotating in a measuring chamber with the measuring means sliding with its one end face against a bottom part of the measuring chamber in which a stable, bell-shaped stiffening element rests against the edge of the bottom part and is arched thereover on the side facing away from the measuring chamber with a rigid connecting member attached to the bottom part and the stiffening element at least in the central region of the bottom part. Preferably support ribs with an external shape corresponding to the inner contours of the bell-shaped stiffening element are connected firmly with the bell-shaped stiffening element.