There are provided a fuel reformer housing container and a fuel reforming apparatus, which are capable of maintaining a level of vacuum inside the fuel reformer housing container favorably and which have less power generation loss. A fuel reformer housing container includes a base having a concave portion for housing a fuel reformer in which reformed gas containing hydrogen gas is generated from fuel, a discharge pipe for communicating inside of the concave portion with outside thereof to discharge the reformed gas from the fuel reformer, a supply pipe for communicating inside of the concave portion with outside thereof to supply the fuel to the fuel reformer, and a gas adsorbent housed in the concave portion, for adsorbing gas in the concave portion.