[Objective] To investigate the clinical outcomes of modified single-screw Scarf osteotomy for correction of hallux valgus. [Methods] From June 2020 to February 2021, a total of 23 patients (30 feet) underwent modified single-screw Scarf osteotomy for treatment of hallux valgus in our hospitals. The Visual Analogue Scale (VAS) for pain, American Orthopaedic Foot and Ankle Society (AOFAS) score for forefoot, Hallux Valgus Angle (HVA), 1st -2nd intermetatarsal Angle (IMA), distal metatarsal articular angle (DMAA) and Handy-Clapham tibial sesamoid indexing was compared between the preoperative and the last postoperative follow-up. [Results] All patients were successfully operated without postoperative complications. Compared the data preoperatively with those at the latest follow-up, the VAS score significantly reduced (P<0.05) , the AOFAS score significantly increased (P<0.05) , HVA score significantly reduced (P<0.05) , IMA score significantly reduced (P<0.05), DMAA score significantly reduced (P<0.05), and Handy-Clapham tibial sesamoid indexing significantly reduced from grades (5.90±1.06) to grades (1.86±0.86) (P<0.05). [Conclusion] The modified single-screw Scarf osteotomy does achieve satisfactory clinical outcomes for correction of hallux valgus. Key words: hallux valgus, modified Scarf osteotomy, clinical efficacy