A method of manufacturing an electromagnetic wave shielding material using a perforated metal thin plate, the method including: forming a gel coat to a mold; forming a first metal layer on a first composite layer by arranging a perforated metal thin plate, after forming the first composite layer on the gel coat layer formed in the first step; forming a second metal layer by arranging a perforated metal thin plate and the first metal layer formed in the second step in such a way that positions of perforations are arranged in a staggered manner without overlapping, after forming a second composite layer on the first metal layer formed in the second step; and molding the electromagnetic wave shielding material by curing and demolding after forming a third composite material on the second metal layer formed in the third step.