To provide a remedy for dermatitis, not giving such a side effect as caused by a steroid medicament, highly safe, and therefore especially used as a remedy for atopic dermatitis.

This remedy for dermatitis contains a compound expressed by the formula (I) (R is H or a halogen), its pharmaceutical acceptable salt, or its pharmaceutical acceptable hydrate as an active ingredient. The remedy is preferably used as a remedy for the atopic dermatitis. The remedy inhibits significantly and dose-relatedly an antigen-induced mouse auricle edematization reaction which is a model for the atopic dermatitis, and further inhibits significantly a mouse antigen-induced flare reaction accompanied therewith. The remedy does not give any side effect on the skin, and therefore has extremely high usefulness as a highly safe medicament against the atopic dermatitis, etc.