To provide a lining method for a concrete wall which gives sufficient concrete adhesion strength, prevents peeling and improves construction efficiency.

By this method resin nets 16 mixed in an inner layer 12 and a heated molten lining resin painted on the inner layer 12 are welded each other by the heat of the lining resin and a lining resin layer 14 is firmly attached to a concrete wall 10 through the inner layer 12. Thus the method can give good peel strength and can improve lining work efficiency by saving labor for lining and simplifying lining work equipment because a preheating by a hot air heater to melt the surface of the inner layer on which a lining resin is painted is not required.