An acid gas separation membrane module comprising: at least one spiral-wound acid gas separation membrane element; and a housing (15, 15'), the at least one spiral-wound acid gas separation membrane element being contained in the housing (15, 15'); and an opening for entry or exit of mixed gas and an exit opening for permeation gas are attached to the housing (15, 15'), the spiral-wound acid gas separation membrane element comprising: a wound body including: a separation membrane; a feed-side channel component; a permeate-side channel component; and a core tube, the separation membrane including: a separate functional layer including: an acid gas carrier that reversibly reacts with acid gas, wherein the acid gas is selected from carbon dioxide and hydrogen sulfide; and an acid gas separation membrane resin; and a support layer including a porous membrane, the separation membrane, the feed-side channel component, and the permeate-side channel component being wound in a laminated state around the core tube, the core tube having a group of holes for allowing communication between a permeate-side spatial portion defined by the permeate-side channel component and a spatial portion inside the core tube, the group of holes being present on an end side of the core tube, the group of holes being positioned not less than 0.05 W and not more than 0.4 W away from a widthwise end of the separation membrane in the laminated state which end is located on the end side, where W represents a width of the separation membrane in the laminated state, and the spiral-wound acid gas separation membrane element being installed in the housing (15, 15') in such a manner that an end of the core tube on which end the group of holes are present is located on a side where one of the three openings is present for exit of the mixed gas. at least one spiral-wound acid gas separation membrane element; and a housing (15, 15'), the at least one spiral-wound acid gas separation membrane element being contained in the housing (15, 15'); and an opening for entry or exit of mixed gas and an exit opening for permeation gas are attached to the housing (15, 15'), the spiral-wound acid gas separation membrane element comprising: a wound body including: a separation membrane; a feed-side channel component; a permeate-side channel component; and a core tube, the separation membrane including: a separate functional layer including: an acid gas carrier that reversibly reacts with acid gas, wherein the acid gas is selected from carbon dioxide and hydrogen sulfide; and an acid gas separation membrane resin; and a support layer including a porous membrane, the separation membrane, the feed-side channel component, and the permeate-side channel component being wound in a laminated state around the core tube, the core tube having a group of holes for allowing communication between a permeate-side spatial portion defined by the permeate-side channel component and a spatial portion inside the core tube, the group of holes being present on an end side of the core tube, the group of holes being positioned not less than 0.05 W and not more than 0.4 W away from a widthwise end of the separation membrane in the laminated state which end is located on the end side, where W represents a width of the separation membrane in the laminated state, and the spiral-wound acid gas separation membrane element being installed in the housing (15, 15') in such a manner that an end of the core tube on which end the group of holes are present is located on a side where one of the three openings is present for exit of the mixed gas. a wound body including: a separation membrane; a feed-side channel component; a permeate-side channel component; and a core tube, a separation membrane; a feed-side channel component; a permeate-side channel component; and a core tube, the separation membrane including: a separate functional layer including: an acid gas carrier that reversibly reacts with acid gas, wherein the acid gas is selected from carbon dioxide and hydrogen sulfide; and an acid gas separation membrane resin; and a support layer including a porous membrane, a separate functional layer including: an acid gas carrier that reversibly reacts with acid gas, wherein the acid gas is selected from carbon dioxide and hydrogen sulfide; and an acid gas separation membrane resin; and an acid gas carrier that reversibly reacts with acid gas, wherein the acid gas is selected from carbon dioxide and hydrogen sulfide; and an acid gas separation membrane resin; and a support layer including a porous membrane, the separation membrane, the feed-side channel component, and the permeate-side channel component being wound in a laminated state around the core tube, the core tube having a group of holes for allowing communication between a permeate-side spatial portion defined by the permeate-side channel component and a spatial portion inside the core tube, the group of holes being present on an end side of the core tube, the group of holes being positioned not less than 0.05 W and not more than 0.4 W away from a widthwise end of the separation membrane in the laminated state which end is located on the end side, where W represents a width of the separation membrane in the laminated state, and the spiral-wound acid gas separation membrane element being installed in the housing (15, 15') in such a manner that an end of the core tube on which end the group of holes are present is located on a side where one of the three openings is present for exit of the mixed gas.