The purpose of the present invention is to provide a medicinal agent which is useful for amelioration or treatment of chronic prostatitis, interstitial cystitis and/or urination disorders. The present invention relates to a novel medical use of an extract from inflamed tissues inoculated with vaccinia virus, and more particularly, it relates to an ameliorating or therapeutic agent for chronic prostatitis, interstitial cystitis and/or urination disorders containing the extract as an active ingredient. The medicinal agent of the present invention containing the extract as an active ingredient is extremely useful as a highly effective and highly safe ameliorating or therapeutic agent for chronic prostatitis, interstitial cystitis and/or urination disorders.