A safety valve mounted on a container and configured to release gas in a container in the case where the temperature rises, in which the safety is secured and a cost reduction is achieved. A movable body 12 includes a shaft portion 21 on which a compression coil spring 13 is fitted and a flange portion 22 configured to come into contact with a fusible alloy 11 by being urged by the compression coil spring 13 . The flange portion 22 of the movable body 12 is provided with through holes 35 configured to discharge the fused fusible alloy 11 into a compression coil spring arrangement space 30.
