Abstract: The present invention relates to pressure relief one-way valves for hermetic packaging, A pressure relief one-way valve for hermetic packaging is provided, comprising a valve body (A), a valve cap (B) and a valve membrane (C), wherein the valve body (A) comprises a base (13) comprising a sealing seat (11) for the valve membrane (C) and one or more holes (6) adapted to let the gas flow through the valve (1), wherein the valve cap (B) is housed in the valve body (A) and comprises a pressure relief one-way opening (4) wherein the valve membrane (C) is flexible and is placed between the valve body (A) and the valve cap (B) in the sealing seat (11).