Background: A number of skin manifestations in patients with allergic contact dermatitis result from sensitization with specific allergens. The patch test is a primary diagnostic tool for identifying allergens causing allergic contact dermatitis. Objective: We identified the results of patch test with Korean standard series in patients with clinically diagnosed with contact dermatitis, and evaluated the specific relationship with each allergen. Methods: During a 5-year period, 743 patients were examined with patch test of standard Korean series. The results of patch test were then evaluated. Location of the skin lesion, age, sex, and occupation of the patients were completely reviewed.