In this study, biotransformation of (+)-fenchone (compound 1) by Salmonella typhimurium OY1002/2A6 expressing human CYP2A6 and NADPH-P450 reductase yielded two oxidized metabolites, namely, (+)-(1S,6R)-6-endo-hydroxyfenchone (compound 2) and (+)-(1S,6S)-6-exo-hydroxyfenchone (compound 3). The conversion rate of compound 1 to compound 2 and 3 was 2.4% and 5.2%, respectively. This is the first study that succeeded in metabolizing compound 1 to obtain large amounts of metabolite 2 and 3 by using S. typhimurium OY1002/2A6 expressing human CYP2A6 and NADPH-P450 reductase.