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.