Provided are: a method for producing a deodorant which is derived from earthworm castings and can be used in a liquid form； and a deodorant. The deodorant production method characterized by including a mixing step of mixing earthworm castings with water and a collecting step of collecting vaporized water generated from a mixture obtained in the mixing step to obtain a liquid； and the deodorant produced by the production method. It is preferred to further mix an organic substance together with the earthworm castings and the water in the mixing step.提供以液狀亦可利用之來自於蚯蚓糞土之除臭劑的製造方法及除臭劑。一種除臭劑的製造方法及以該製造方法得到之除臭劑，所述除臭劑的製造方法之特徵在於，其包含：將蚯蚓之糞土與水進行混合之混合步驟、及將由前述混合步驟中得到之混合物產生之氣化的水回收而得到液體之回收步驟。較佳於前述混合步驟中，與前述蚯蚓之糞土及前述水一起進一步混合有機物。
