Provided is a container (1) capable of protecting a freezing bag (2) filled with a living tissue and appropriately cooling and heating the freezing bag (2). A container (1) having a substantially rectangular parallelepiped shape for accommodating a freezing bag (2) filled with a living tissue and cooling and heating the freezing bag (2), formed on a side surface of the container (1). At least one opening (10) and at least two protrusions (11) formed on the inner surface of the container (1) and forming a gap between the inner surface and the freezing bag (2). Said container (1) comprising:生体組織が充填された凍結バッグ(2)を保護し、凍結バッグ(2)の冷却と加熱を適切に行うことができる容器(1)を提供する。 生体組織が充填された凍結バッグ(2)を収容し、該凍結バッグ(2)を冷却、加温するための略直方体の容器(1)であって、前記容器(1)の側面に形成される、少なくとも1つの開口部(10)と、前記容器(1)の内面に形成され、該内面と前記凍結バッグ(2)との間に空隙を形成する少なくとも2つの突条部(11)とを含む、前記容器(1)。