The invention relates to a stator (10) for eccentric screw pumps (2) comprising a stator casing (16) for an elastomeric body (20) for receiving a rotor, which elastomeric body is provided with at least one flange (18), wherein the flange (18) is arranged in a recess between the stator casing (16) and a connecting body (4, 6), wherein the fixing of the elastomeric body (29) in the stator casing should be improved. According to the invention the stator casing (16) has cavities (50), recesses and/or raised areas at least on one face, which are open toward the front.