BCG osteomyelitis occurs in the infants and children as complication of BCG vaccination and its occurrence is very rare. It involves the metaphysis of the long bone and its development is chiefly hematogenous spread and direct inoculation. Radiologic feature shows well demarcated, eccentrically located destruction in the metaphysis of the long bone and soft tissue swelling about the lesion but periosteal reaction was absent initially. We experienced a case of BCG osteomyelitis which occurs in the left proximal humerus in 3 month after BCG vaccination.