Objective: To study the effect of night-time hallux valgus strap usage on decreasing the progression of hallux valgus angle.Methods: Patients, who were older than eighteen years old with moderate to severe degree of hallux valgus, were randomized into 2 groups: the study group (prescribed to use night-time hallux valgus strap for 8 hours per night for 12 months), and the control group. Patients in both groups were advised to have proper foot care with proper shoes.Results: There were 25 patients in the study group and 22 patients in the control group. No statistical difference was found in demographic data between both groups. The hallux valgus angle, which was obtained through radiographic measurement, was decreased in both groups. However, there were no statistically significant differences in the decrease of hallux valgusangle between the two groups (p>0.05).Conclusion: Prescribing to use night-time hallux valgus strap for 12 months cannot decrease the progression of the hallux valgus angle more than the control group.