To provide a medicament having high curative effects irrespective of the sources of dermatophytotic symptoms, the genus Trichophyton or Candida.

The medicament as an antimycotic agent for external use having synergistic effects is provided, being characterized by being obtained by compounding lanoconazole or its salt and one or more antimycotic agents selected from tolnaftate, zinc undecylenate, cyclopiroxolamine, haloprogin, benzethonium chloride, cresol and chlorhexidine hydrochloride in specific proportions.