Sixty-seven primary THR surgeries in 57 patients between January 1992 and December 1998 were reviewed after a mean follow-up of 35.9 months. The rate of superficial and deep wound infections were 11.9% and 1.5% respectively. The most common organism in superficial wound infection was Staphylococcus aureus. The factors that were significantly associated with superficial wound infection were diabetes mellitus (p= 0.0230) obesity (p=0.0088). The patients who developed superficial wound infection have a significantly longer duration of surgery compared to patients without infection (p=0.014). However, there was no significant difference between the mean age among patients with and without superficial wound infection (p=0.814).