NOVELTY - A spiral-type acidic gas separation module is obtained by winding a laminate containing an acidic gas separation layer (20), a supply gas flow path component (24), a permeation gas flow path component and a center tube. The average fiber diameter of supply gas flow path component is 100-900 mu m. The area ratio of recesses which are inscribed in hemispheres having diameter equal to more than three-quarters of the fiber diameter of the supply gas flow path component is 50% or less.    USE - Spiral-type acidic gas separation module is used for separating acidic gas e.g. carbon dioxide gas from source gas for manufacturing hydrogen gas, and purification of natural gas.    ADVANTAGE - The spiral-type acidic gas separation module has excellent quality and stability. Damage to the facilitated-transport film resulting from slidable contact with the facilitated-transport film and supply gas flow path component during winding can be prevented.    DETAILED DESCRIPTION - A spiral-type acidic gas separation module is obtained by winding a laminate containing an acidic gas separation layer, a supply gas flow path component, a permeation gas flow path component and a center tube, and comprises the center tube in which a through-hole is formed in the tube surface, a supply gas flow path component containing a woven fabric and a nonwoven fabric and used as flow path of source gas, a facilitated-transport film (21) containing a hydrophilic compound for carrying the carrier, and the carrier reacts with to separate acidic gas from the source gas, the acidic gas separation layer which has a porous support (22) which allows to pass through the acidic gas, the permeation gas flow path component used as flow path through which even the center tube flows, and an auxiliary support film (22b) containing woven fabric and nonwoven fabric of the component side for permeation gas flow path. The average fiber diameter of feed gas passage component is 100-900 mu m. The area ratio of recesses which are inscribed in hemispheres having diameter equal to more than three-quarters of the fiber diameter of the feed gas passage component is 50% or less, in the surface which is one of the surfaces of auxiliary supporting membrane constituting a porous supporter and opposite to the facilitated transport membrane side.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the laminate of acidic gas separation module.    Acidic gas separation layer (20)    Facilitated-transport film (21)    Porous support (22)    Auxiliary support film (22b)    Supply gas flow path component (24)