Background. Postoperative nasal septum perforation (PNSP) is one of the complication of the nasal septum (NS) surgery, with an incidence of 1–8 %. Surgical repair of the nasal septum improves the patients' quality of life. The most effective techniques are the ones using two rotation flaps of the nasal mucosa, which are used for the plasty of traumatic and idiopathic perforations. The results of implementing this technique for the closure of PNSP require a comprehensive study Aim. To evaluate the effectiveness of rotary flaps of the nasal mucosa in postoperative nasal septum perforation repair. Materials and Methods. 18 patients with postoperative nasal septum perforation were operated on. The number of the patients depending on the area (S) of the PNSP was S <1cm2 — 4, S 1-2 cm2 — 10, S > 2cm2 — 4. The criterion for the technique efficiency was the fact of intraoperative complete closure of the PNSP, and the absence of recurrences of the PNSP within 1 year. We analysed the cause-and-effect relationships between the structural features of the PNSP (6 types were identified) with the technique of execution and long-term results. Results. Complete intraoperative closure of PNSP in 13 of 18 patients (72 %). In 5 patients, an additional sampling of temporal autofascia was performed with subsequent implantation between the flaps for intraoperative complete closure of the PNSP. In 4 out of 13 patients (30 %) with PNSP S 1-2 cm2 the PNSP relapse (type 3, 4) was noted. There was 1 relapse (type 5) with PNSP S > 2cm2 in 1 out of 5 patients (20 %), to whom autofascia was additionally used. Conclusions. The surgery of the PNSP according to the specified technique is effective with the PNSP S <1cm2; at S 1-2 cm2 it leads to distant relapses in 30 % of the cases, S > 2 cm2 is not effective. The use of a temporal fascia autograft allows to increase the efficiency of the postoperative nasal septum perforation regardless the area of it.