The present invention relates to a therapeutic agent for fungal dermatitis, containing luliconazole or a pharmaceutically acceptable salt thereof as an active ingredient, and a composition for the treatment of fungal dermatitis, containing (1) luliconazole or lanoconazole in a substantially dissolved state as an active ingredient, (2) an oily base, (3) 0.5 to 3% by mass of an emulsifier relative to the total amount of the composition, (4) water and (5) 0.5 to 1.5% by mass of an emulsion stabilizer relative to the total amount of the composition.The present invention provides a therapeutic agent for fungal dermatitis, which shows a strong activity against a pathogenic species of fungal dermatitis, and further provides a composition also having various properties suitable for use for the treatment of fungal dermatitis.