A cold-insulating container capable of keeping contents in a cold-insulated state without causing temperature unevenness or freezing damage to the contents is provided. To provide a refrigerant receiver capable of supporting a refrigerant arranged in a cold insulation container and keeping the contents in a cold insulation state without causing temperature unevenness or freezing damage to the contents. A collapsible cold-insulating container (1) having a bottom panel (30A), a side panel (10) and a ceiling panel (30B) which are assembled to each other, in which a ventilation path for sending cold air downward is provided on the inner surface of the side panel (10) in a vertical direction. formed along. [Selection drawing] Fig. 1【課題】内容物に温度むらや凍結障害が生じることなく、内容物の保冷状態を保つことができる保冷容器を提供する。保冷容器に配置される冷媒を支持し、内容物に温度むらや凍結障害が生じることなく、内容物の保冷状態を保つことができる冷媒受けを提供する。【解決手段】互いに組み付けられる底面パネル30A、側面パネル10および天井パネル30Bを有する組み立て式の保冷容器1であって、側面パネル10の内面に、上方の冷気を下方に送り込む通気路が上下方向に沿って形成されている。【選択図】図1