The biotransformations of (–)-verbenone by Aspergillus tamarii and Aspergillus terreus were described. The biotransformation of (–)-verbenone with A. tamarii and A. terreus for 7 days gave (–)-10-hydroxyverbenone. The biotransformation of (–)-verbenone by A. tamarii resulted in a higher yield. A. tamarii and A. terreus were first two microorganisms to hydroxylate (–)-verbenone.