PURPOSE:To enable a uniform flow down to be attained with no blocking in a liquid flow path by providing a flow path thickness-forming structure forming the liquid flow path between a protrusive streak and a liquid processing film by the protrusive streak extending along a flow direction of liquid and a notch part in each protrusive streak with a predetermined space in the lengthwise direction. CONSTITUTION:A partitioning plate part 8 forms in its both sides 9, 9 plane parts 9a, 9b, and two or more notched parts 9c... are provided with a predetermined space in a lengthwise direction of two or more inflow port side protrusive streaks 9b... in these protrusive streaks formed in the inside of the plane parts 9a, 9b. These inflow port side protrusive streaks 9b... are formed almost parallelly with each other. A liquid flow path A... of these protrusive streaks communicates with each other by the two or more notched parts 9c.... Accordingly, inflow liquid from a liquid inflow port 2 is allowed to flow in the respective liquid flow path A, even when the liquid flow path A iscblocked in its certain one part by a block in liquid, it bypasses the flow path by the notched part 9c, and the liquid is averagely supplied to the first filter material 6a.
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