The present invention provides a volume variable container which comprises: a storage container; a pipe installed inside the storage container to be able to move along one direction of the storage container; a first mounting groove formed along the inner edge of the pipe; an elastic body blocking food from moving through a gap between the storage container and the pipe; and a first elastic ring formed along the edge of the elastic body, and mounted on the first mounting groove for extending the elastic body in the one direction when the pipe is moving.
