The hollow fiber membrane sheet is a hollow fiber membrane sheet type in which a plurality of hollow fiber membranes are arranged in parallel and fixed to each other in a state where both longitudinal end faces of the hollow fiber membranes are opened. E) of 100% or more, and in which at least one row of belt-like binding portions extending in a direction orthogonal to the longitudinal direction is formed at both ends so that a plurality of hollow fiber membranes are fixed to each other, .
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