[Abstract] Provided is a means with which, during frozen storage of a biological sample or drug, the biological sample or drug stored inside a frozen storage container is not susceptible to contamination. [Problem] A frozen storage container 10 is provided with a container body 11 with an internal space 13, and a partition wall 12 for dividing the internal space 13 of the container body 11 at least into a first space 14 and a second space 15. The container body 11 is sealed so as to be liquid-tight in the first space 14, the second space 15 has an opening 22 that is in communication with the outside, and the second space 15 can be sealed so as to be liquid-tight by welding the container body 11. A frozen storage container system 40 is provided with: a frozen storage container 10； and a needle member 41, which has a needle tip 42 that can be inserted into the internal space 13 of the container body 11 and can pierce the partition wall 12, and has a flow channel that opens to the needle tip 42 and opens to the base end 43 that is opposite to the needle tip 42.
