To provide a squeeze rubber film which decreases the wear of an outer peripheral rubber film part to enable extension of a durable life and reduction of running cost without deterioration of original squeezing performance while ensuring an exact and sufficient sealing function causing no liquid leakage or the like.

A groove 3 is formed in the pressurizing surface 1a, closely contacting with a filter cloth, of the outer peripheral rubber film part 1A of the squeeze rubber film 1 made by connecting and integrating the outer peripheral rubber film part 1A being pressurized and closely contacting with the outer peripheral part of the filter cloth to exhibit a sealing function, and a center rubber film part 1B squeezing a solid-liquid mixture, injected between it and the filter cloth, by expansive deformation due to a pressure fluid to separate the mixture into liquid and solid. A reinforcing member 4 made of a material having a rigidity and wear resistance higher than those of the outer peripheral rubber film part 1A is detachably fitted into the groove 3 and retained in a state protruding its surface from the closely contacting and pressurizing surface 1a, and layered on the outer peripheral rubber film part 1A.

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