The efficacy and safety of application of camellia oil in conjugation with a treatment using camellia oil-containing shampoo for various scalp diseases were evaluated. Fifty-two subjects with mild scalp diseases, such as atopic dermatitis and seborrheic dermatitis, were enrolled in this study. Camellia oil was applied to the whole scalp and rinsed off roughly 5 to 10 minutes later with warm water. The scalp and scalp hairs were then washed using a shampoo containing camellia oil. These procedures were performed once daily for four weeks without any modification in the routine treatment of the patient's disease. Grades of clinical manifestations, such as redness, wetness, scaling, encrustation, dryness and itching, were recorded weekly. Efficacy of the treatment was evaluated in 37 cases, and the results indicated that scores in scaling and encrustation significantly improved. The percentage of subjects who showed slight to significant improvement was 78.4%. The skin manifestations were exacerbated in two cases, and adverse effects were observed in five cases. The patients were later asked to answer a questionnaire regarding their impressions of the treatment, 69.7%o of the patients answered that they found the treatment refreshing and not too oily (as in leaving an oily residue). These results suggest that a combination of camellia oil and shampoo containing camellia oil is a good hair and scalp-washing product for patients with various scalp diseases.