PROBLEM TO BE SOLVED: To provide a water-resistant gas adsorbent and a gas purification filter which can maintain deodorization performance even under severe environments such as condensation, contact with water droplets, and washing with water.MEANS FOR ACHIEVING THE PURPOSE: A gas adsorbent is obtained by attaching polytetrafluoroethylene with a melting point of 35°C or more and 290°C or less to a porous adsorbent.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】結露、水滴との接触、水洗洗浄といった過酷な環境下においても、脱臭性能を維持することが可能な、耐水性ガス吸着材および気体浄化フィルターを得ること。【達成手段】多孔質吸着材に融点35℃以上290℃以下のポリテトラフルオロエチレンを付着させてなるガス吸着材。【選択図】なし