HOLLOW FIBER MEMBRANE MODULE

A case has a first pipe and a second pipe. In the case, a holding member that holds a plurality of hollow fiber membranes is provided. The holding member includes a first plate-shaped portion and a second plate-shaped portion provided to sandwich the plurality of hollow fiber membranes and a connection portion connecting the plate-shaped portions. A passage passing from the first pipe to the first plate-shaped portion is formed between the first plate-shaped portion and the case and a passage passing from the second pipe to the second plate-shaped portion is formed between the second plate-shaped portion and the case.