Objectives : Allergic rhinitis is one of the most common allergic diseases. The aim of this study was to evaluate the clincal effect of herbal medicine(Gamitonggue-tang) in patients with allergic rhinitis by using acoustic rhinometry. Methods : A total of 22 individuals with allergic rhinitis who visited the Dept. of Oriental Medical Opthalmology & Otolaryngology & Dermatology of Daegu Hanny Oriental Medical Center from June 1st, 2006 to February 28th, 2007 were included in this study. In this study, they were only treated with Gamitonggue-tang. For 4 weaks the flow resistance of nasal cavity and total nasal volume, nasal minimum cross-sectional area were measured by acoustic rhinometry at the 1st, the 14th and the 28th day. And symptom score of nasal obstruction were recorded. Results : There were no significant differences on sex, age and onset. After treatment(2, 4 weeks) the calculated flow resistance of nasal cavity, total nasal volume and nasal minimum cross-sectional showed no significant changes(p>0.05). But symptom score of nasal obstruction showed significant changes(p<0.05). Conclusions : Considering the above results, treatment with herbal medine(Gamitonggue-tang) could be efficacious in allergic rhinitis. Further studies in other methods are needed.