A degassing module comprising: a tube unit; and a housing in which the tube unit is accommodated, wherein the tube unit has multiple tubes, a first bundling portion that bundles first end portions of the multiple tubes and a second bundling portion that bundles second end portions of the multiple tubes, wherein the second end portions are at an end opposite from the first end portions, the end portions of respective tubes are spaced from each other, each of the tubes is a tubular membrane that allows gas to pass and prohibits liquid from passing, each of the end portions of respective tubes has a tube wall portion that tubularly extends in an extension direction of the tubes, and a protrusion protruding radially outward from the tube wall portion, each one of the first bundling portion and the second bundling portion has an outer sheath fitted around the tubes and a sealing portion that fills a space among the end portions of respective tubes and the outer sheath, and the housing has a housing body that is cylindrically shaped and has an opening at one end, a lid that closes the opening of the housing body, a first opening and a second opening both of which are in communication with interior spaces of respective tubes, a first connector that is jointed to the lid and has the first opening formed thereon, a second connector that is jointed to the lid and has the second opening formed thereon, and a suction port being in communication with a space outside the tubes, wherein the first bundling portion is connected to the housing at the first opening, the second bundling portion is connected to the housing at the second opening, and the first bundling portion is connected to the first connector, and the second bundling portion is connected to the second connector. a tube unit; and a housing in which the tube unit is accommodated, wherein the tube unit has multiple tubes, a first bundling portion that bundles first end portions of the multiple tubes and a second bundling portion that bundles second end portions of the multiple tubes, wherein the second end portions are at an end opposite from the first end portions, the end portions of respective tubes are spaced from each other, each of the tubes is a tubular membrane that allows gas to pass and prohibits liquid from passing, each of the end portions of respective tubes has a tube wall portion that tubularly extends in an extension direction of the tubes, and a protrusion protruding radially outward from the tube wall portion, each one of the first bundling portion and the second bundling portion has an outer sheath fitted around the tubes and a sealing portion that fills a space among the end portions of respective tubes and the outer sheath, and the housing has a housing body that is cylindrically shaped and has an opening at one end, a lid that closes the opening of the housing body, a first opening and a second opening both of which are in communication with interior spaces of respective tubes, a first connector that is jointed to the lid and has the first opening formed thereon, a second connector that is jointed to the lid and has the second opening formed thereon, and a suction port being in communication with a space outside the tubes, a housing body that is cylindrically shaped and has an opening at one end, a lid that closes the opening of the housing body, a first opening and a second opening both of which are in communication with interior spaces of respective tubes, a first connector that is jointed to the lid and has the first opening formed thereon, a second connector that is jointed to the lid and has the second opening formed thereon, and a suction port being in communication with a space outside the tubes, wherein the first bundling portion is connected to the housing at the first opening, the second bundling portion is connected to the housing at the second opening, and the first bundling portion is connected to the first connector, and the second bundling portion is connected to the second connector. the first bundling portion is connected to the housing at the first opening, the second bundling portion is connected to the housing at the second opening, and the first bundling portion is connected to the first connector, and the second bundling portion is connected to the second connector.