To provide a weed-proofing/termite-proofing composition having both a weed-proofing effect and a termite-proofing effect; and to provide a weed-proofing/termite-proofing method using the weed-proofing/termite-proofing composition.SOLUTION: There are provided a weed-proofing/termite-proofing composition containing a hydraulic weed-proofing material and a termite-proofing agent, and a weed-proofing/termite-proofing method including steps of: laying the weed-proofing/termite-proofing composition over the ground; and spraying water over the weed-proofing/termite-proofing composition laid over the ground. Further, a weed-proofing/termite-proofing method is also provided, which includes steps of: producing a kneaded product of the weed-proofing/termite-proofing composition by kneading the weed-proofing/termite-proofing composition with water; and covering the ground with the weed-proofing/termite-proofing composition by spraying the kneaded product of the weed-proofing/termite-proofing composition over the ground.SELECTED DRAWING: None【課題】防草効果及び防蟻効果の両方を有する防草・防蟻組成物及びその防草・防蟻組成物を用いた防草・防蟻方法を提供する。【解決手段】水硬性を有する防草材と防蟻剤とを含む防草・防蟻組成物、防草・防蟻組成物を地面に敷き詰める工程及び地面に敷き詰めた防草・防蟻組成物に散水する工程を含む防草・防蟻方法、さらに防草・防蟻組成物を水で練混ぜて防草・防蟻組成物の混練物を作製する工程及び防草・防蟻組成物の混練物を地面に吹き付けて、防草・防蟻組成物の混練物で地面を被覆する工程を含む防草・防蟻方法。【選択図】なし