A 54-year-old man who had received intravesical instillation of bacillus Calmette-Guerin(BCG) after transurethral resection for bladder cancer suffered from multiple arthritis, bilateral conjunctivitis, miction pain and high fever. Under the diagnosis of Reiter's syndrome, a nonsteroidal anti-inflammatory drug, histamine antagonists, anti-tubercular agent and corticosteroid were administered. The symptoms were improved within one month. It is important in early diagnosis and treatment of Reiter's syndrome to observe carefully the complications following intravesical instillation of BCG.