Disclosed is a drug effective in the treatment of fibromyalgia. Basically, the disclosed therapeutic agent was created on the basis of experiments showing improvement in symptoms when etanercept was administered to patients suffering from fibromyalgia. Etanercept is known as a therapeutic agent for rheumatoid arthritis, and the JFIQ score of patients not suffering from fibromyalgia improved considerably in the preferred embodiment. In other words, a therapeutic agent for fibromyalgia is disclosed that contains etanercept as an active ingredient in an effective amount.
