Introduction:Amnesia is one of the most important goals in General Anesthasia. From the Point of Psychological views, Awareness in G.A is not desirable, and elimination of it, is necessary. Overall 1% of all patients have awareness and it maybe 10% in some anesthesia techniques. There is not a precise statiscal survey about awareness in NLA. This study attempts to present a statistical work.Methods: All of the 60 patients in this study were 20-45 years old, under spinal surgery and in class I - ASA. All of them have been taken 10mg of Diazepam over the night before operation and 7ml/kg of Ringer solution has been administered in the operating room. (Group A): Neurolept anesthesia started with induction (Talamoonale 0.1 ml/kg, Thiopental 5 mg/kg, Pancuronium 0.1 mg/kg), maintained with N20- Fentanyl (50 mg/30 min) 0.1mg/kg) and maintenance with (Halothane 0.6%, N20, Fentanyl 50 mg/30 min) was administered.A tape player was used during G.A. Patients were requested answer the questions in recovery room and 24 hour after anesthesia. Results:According to Z test, there is no significant difference in awareness between the two groups studied. Also according to X2 test, there is no significant difference in awareness between the two groups studied. All cases of awareness were in 35-45 years of age. Conclusion:In NLA the voice heard by the patient is not perceived unpleasant. According to results, awareness in NLA was not more compared to the other anesthesia techniques. So NLA can be used as a safe technique with more advantage in Poor Risk patients and who needs wake up test during surgery.