Background: Allergic rhinitis (AR) is defined as an inflammation of the lining mucosa of the nose induced by allergen exposure. The olfactory disturbance could affect around 21%-23% of AR patients.Purpose: To determine the olfactory performance of AR patients at the Allergy-Immunology outpatientclinic, ENT Department, Cipto Mangunkusumo Hospital. To find out the mean difference of olfactorythreshold, discrimination, and identification (TDI) score between intermittent AR group and persistent ARgroup, and also to determine the percentage of the AR patient who had olfactory disturbance. Method:Observational descriptive study with cross sectional method to assess the TDI in AR patients using theSniffin’ sticks extended test. Results: The olfactory performance characteristics of AR patients were:threshold score 0,25; discrimination score 7,00; identification score 10,10; TDI score 23,50. There wasno statistical difference of the TDI mean score between intermittent AR group and persistent AR group.In our study, 45% of all AR subjects were reported to have olfactory disturbance. Conclusion: The TDIresults which represent olfactory function of AR patients were lower compared to the healthy subjects.