A breast pump (100) includes a left cup portion (1), a right cup portion (2), a tube (15, 16, 99), a pump (30), a container (14), a first switching valve (V1), a second switching valve (V1), and a control unit (70). The internal space of the tube (99) forms a passage (10). The passage (10) connects a first separator (S1) that communicates with a closed space (51), a second separator (S2) that communicates with a closed space (52), a discharge hole (31) of the pump (30), and a suction hole (32) of the pump (30). The first switching valve (V1) is provided within the tube (99) that is in the middle of the passage (10). The second switching valve (V2) is also provided within the tube (99) that is in the middle of the passage (10).
