Provided is a compound presenting high efficacy in diseases caused by Trichophyton by having excellent antifungal activity against Trichophyton, which is a major causative organism of superficial mycoses. A biaryl derivative represented by general formula (I) [in the formula, ring A represents an optionally substituted phenyl or optionally substituted 5- or 6-membered ring heteroaryl (ring A may be further condensed to form an optionally substituted fused ring)； Q is CH
