To provide a detergent which does not contain a harmful chemical but has an antibacterial action.

0.1 to 0.3 wt.% of a Japanese cypress oil is contained in a soap component. An antibacterial action of the Japanese cypress keeps a person who is allergic to an animal from a chappy skin and an inflammation during washing and cypress fragrance of the Japanese cypress oil suppresses an oil smell and further waste water of the soap does not cause an environmental pollution. Caustic soda is added to a raw material oil while the mixture is heated by steam and impurities are removed to give a composition comprising 90% of a soap component and 10% of an oil component. To the composition is then added 800 cc of the Japanese cypress oil produced in a process other than the detergent production process while the mixture is stirred for 10 to 20 minutes.