Abstract: A rotary positive-displacement fluid-pressure machine which includes a casing, two intermeshing rotors, end plate means associated therewith, and a pressure-balancing arrangement associated with the end face of each end plate means remote from the rotors and with an adjacent casing face. The arrangement comprises sealing means which separate, one from another, a plurality of areas on said end face individually subjectable to fluid-pressures and which comprise resilient members disposed in respective grooves, as well as a non-extrudable element against portions of which those members bear. The members and element together establish fluid-sealing between the end face remote from the rotors and the adjacent casing face. At least one portion of said non-extrudable element is so disposed as to cross a respective land which is recessed to accommodate that portion.