PURPOSE: To obtain a lightweight woven fabric, excellent in perspiration emitting properties and suitable for clothes field such as sportswears, uniforms or casual wears due to its excellent performances.

CONSTITUTION: This method for producing a lightweight perspiration emitting woven fabric woven so as to provide double warp and weft yarns is to use a combined filament yarn of different sizes comprising fibers of a flat cross section having one or more protruding parts in the outer peripheral part of the fiber cross section and 1.5-5 flatness degree in the front textile weave and a core-sheath conjugated fiber, having a readily alkali-soluble polymer arranged in the core part of each single filament, a slightly alkali-soluble polyester-based polymer arranged in the sheath part, the readily alkali-soluble polymer arranged at a width of ≤1/5 the diameter of the single filament in the longitudinal direction thereof in the sheath part in the back textile weave and further the readily alkali-soluble polymer accounting for 20-50% based on the total cross-sectional area and carry out water absorbing processing of the woven fabric.