A retrospective report regarding MRSA infections, related to wards and physicians in the hospital, was carried out. The number of the patients infected by MRSA in every wards was compared. Less patients with MRSA infection ware observed in the orthopaedic ward. An epidemiologic study using culture sampling of MRSA was performed at the isolated room for the patient with MRSA infection. Positive cultures were also detected in several areas in the ward, in addition to that room. Then the infection risk of every places in the hospital was suspected. Four cases of orthopaedic patients with MRSA were described.