Disclosed are a method of manufacturing an RNA membrane and an RNA membrane manufactured thereby, wherein the RNA membrane can be produced at lower cost, in which the RNA membrane is composed exclusively of RNA, and thus has no toxicity in vivo, is controllable, and can be effectively applied to bio-organs such as the pericardium, as well as the production of peptides or proteins, and particularly, long linear RNA strands, which have not yet formed particles, are concentrated on the surface of a tube by inducing an evaporation process to thus activate the bonding of base pairs thereof, and the roughness and thickness of the RNA membrane can be controlled by changing the manufacturing conditions.