Brodie's abcess, a local form of subacute osteomyelitis, is a rare disease and usually occurs in the metaphysis or epiphysis of the long tubular bone in young adults. Generalized symptoms and signs resembling infectious disease are uncommon. Abnomalities in laboratory findings are not severe. Because of these characteristics and nonspecific radiology, there are difficulties in the differential diagnosis with other infectious disease and tumorous conditions. The authors experienced a case of Brodie's abcess in the proximal tibia bilaterally.