Azomonas agilis PY101 removed approximately >90% of Cd2+ from solution in continuous aerobic culture. After the unsteady stale, approximately 5 days after inoculation, Cd2+ concentration in the artificial wastewater containing 1 mM CdCl2 remarkably decreased to below 92 to 96% of initial value during the growth of A. agilis PY101. A. agilis PY101 cells grown into the artificial wastewater actively uptaked Cd2+ (from 2.37 to 6.28 mM/g dry weight cells) in the cell.