PROBLEM TO BE SOLVED: To provide a porous material and a method for producing a porous material, which have functions of controlling humidity, deodorizing and removing harmful substances by adsorption, are hard to collapse, and improve the living environment and the outdoor environment. A porous material contains diatomaceous earth and sludge ash or a bag material as main components. The porous material may contain diatomaceous earth in an amount of more than 0% by mass and 50% by mass or less, and sludge ash or a bag material in an amount of 50% by mass or more and less than 100% by mass. The porous material may include a diatomaceous earth chip 10 obtained by crushing diatomaceous earth, and a coating layer 20 of sludge ash or a bag material on the surface of the diatomaceous earth chip 10. Further, the porous material contains a porous base material and bittern as main components. The bitter juice may adhere to a part of the surface and / or the inside of the porous substrate. The porous substrate may include diatomaceous earth, sludge ash, bag material, or a mixture thereof. [Selection diagram] Figure 1【課題】吸着による調湿・消臭・有害物質の除去機能を備え、崩れにくく、住環境や屋外環境を改善する、多孔質材および多孔質材の製造方法を提供する。【解決手段】多孔質材は、珪藻土と、スラッジ灰またはバグ材と、を主成分として含む。多孔質材は、珪藻土を０質量％超５０質量％以下含み、スラッジ灰またはバグ材を５０質量％以上１００質量％未満含むとよい。多孔質材は、珪藻土を粉砕した珪藻土チップ１０と、該珪藻土チップ１０の表面にスラッジ灰またはバグ材のコーティング層２０と、を備えるとよい。また、多孔質材は、多孔質基材と、苦汁と、を主成分として含む。苦汁は、多孔質基材の表面及び／又は内部の一部に付着しているとよい。多孔質基材は、珪藻土、スラッジ灰、バグ材、またはこれらの混合物を含むとよい。【選択図】図１
