3-Arylamino-2-phenylsulfinylnaphthoquinones, 2, 3-diarylthio-naphthoquinones and 2- phenylsulfinyl-3-arylthio-1, 4-dihydronaphtalenes are synthesized and tested against five fungi. The activities of these products were better than amphotericine B against all the strains except for Candida albicans.