NOVELTY - Method for manufacturing a biomedical signal conductive membrane involves (a) providing a natural polymer material, (b) dissolving the natural polymer material by adding an acid solution, (c) drying the liquid mixture to form an initial stage of membrane, (d) cross-linking by cross-linking agent for transforming the initial stage of membrane into a gel membrane, and (e) rinsing to remove the cross-linking agent and keep water molecules remaining within the cross-linked network.    USE - The method is useful for manufacturing a biomedical signal conductive membrane (claimed).    ADVANTAGE - The method enables the property modification of natural polymer material to prevent generation of toxic monomer that contaminates the environment and injures human body, and hence the manufactured conductive membrane does not cause cytotoxicity and skin disorders. The conductive membrane has a smooth contact surface that prevents adherence from the gel membrane, and is suitable for application to various regions of human body thus results in increase in convenience and range of use, substitutes for liquid conductive gel and conductive pad, and satisfies the requirement of the health care employees and subjects. The conductive membrane possesses functions of disposability thus bacteria cross-infection in a sickroom is prevented.    DETAILED DESCRIPTION - Method for manufacturing a biomedical signal conductive membrane involves (a) providing a natural polymer material, (b) dissolving the natural polymer material by adding an acid solution to form a viscous liquid mixture, (c) drying the viscous liquid mixture to form an initial stage of membrane, where the structure of natural polymer material within the initial stage of membrane is a straight chain, (d) cross-linking by cross-linking agent for transforming the initial stage of membrane into a gel membrane, where the structure of natural polymer material within the gel membrane is a cross-linked network, and (e) rinsing to remove the cross-linking agent and keep water molecules remaining within the cross-linked network of natural polymer material.    DESCRIPTION OF DRAWING(S) - The drawings is a flow chart illustrating the method for manufacturing a biomedical signal conductive membrane.    Step of providing a natural polymer material (11)    Step of adding an acid solution (12)    Drying step (13)    Cross-linking step (14)    Rinsing step (15)    Moisturizing step (16)