Abstract: Objective To assess the effect of laryngeal mask i-gel（LMA i-gel） used on airway of patients undergoing laparoscopic surgery. Methods Fifty ASAⅠorⅡpatients who aged 20-60 years and weighted 50-80kg,undergoing selective laparoscopic surgery,with no contraindications for laryngeal mask on airway and with their BMI＜30kg/m²,were divided into i-gel group（group I） and laryngeal mask supreme group（group S）,25 in each group.After the LMA supreme and i-gel（size 4 each） were inserted into the patients of group S and group I after anesthesia.The duration of inserting LMA and the success rate of first try of insertion were recorded.The peak airway pressure was measured.Then,the VT and RR were adjusted to 8ml/kg and 10bpm,respectively.The RR was adjusted during operation according to the PetCO₂.Max and mean airway pressure were recorded before and after pneumoperitoneum.The patients were followed up for LMA i-gel-related complications after operation. Results A 100% success rate for LMA insertion was achieved in the two groups and both the first insertion success rate for LMA was 92%（P＞0.05）.The peak airway pressure was significantly higher after pneumoperitoneum than before pneumoperitoneum during mechanical ventilation（P＜0.05）.However,it was lower than the airway sealing pressure in the two groups（P＜0.05）.The ventilation effect was good in the two groups after pneumoperitoneum with no adverse reactions occurred such as hypoxemia.The blood stain was observed on the LMA removed from 2 patients of group S and 1 patient of each group had sore throat. Conclusion The success insertion rate of LMA i-gel is as high as that of LMA supreme,with a reliable airway sealing pressure and few postoperative complications,and can thus be used in small laparoscopic operation.