PROBLEM TO BE SOLVED: To provide a freshness retainer excellent in reliability, maintainability, and safety capable of maintaining the predetermined or more humidity without any power for humidification to be excellent in energy saving and trouble free while being capable of installing and fixing the retainer in a container storage part of the existing container within a short time, resulting from the light weight, compactness, and easy transportation by human, and excellent in handleability and versatility causing no water leakage during transportation so as to enable accommodation of articles to store for a long period by preventing water wetting of the articles to store, preventing generation of mold and eliminating ethylene gas generated from the articles to store.SOLUTION: A freshness retainer comprises: an endothermic water part for in-taking coordination air blowing from the front bottom of the container storage part to the inside of an enclosure for humidification and an air cleaning part provided on the downstream side or upstream of the endothermic water part having a sterilization part for sterilizing the coordination air and/or an ethylene gas removal part for at least any one of absorption and breakdown of ethylene gas containing in the coordination air.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2016,JPO&INPIT【課題】加湿のための動力が不要で省エネルギー性に優れ、故障することもなく、一定以上の湿度を保つことができ、動作の確実性、メンテナンス性に優れ、軽量かつコンパクトで人手で容易に搬送でき、既存のコンテナ収容部に短時間で設置固定でき、取扱い性、汎用性に優れ、輸送中等に水が漏れず、収容物の水濡れを防止でき、カビの発生を防止し、収容物から発生するエチレンガスを除去して収容物の長期保存を可能にする信頼性、安全性に優れた鮮度保持装置。【解決手段】コンテナ収容部の底部前方から吹き出す調和空気を筐体内に取入れて加湿する吸発水部と、吸発水部の下流側又は上流側に配設され調和空気を除菌する除菌部及び/又は調和空気に含まれるエチレンガスの吸着又は分解の少なくともいずれか一方を行うエチレンガス除去部を有する空気清浄部と、を備える。【選択図】図2