Purpose : The purpose of this study was to investigate the recovery time and its related factors after sedative gastroscopy. Method : The subjects of this study consisted of 103 clients. The data were collected from clients who visited a health care system at S national university hospital in Seoul. The sedative gastroscopy was performed by gastrointestinal endoscopists. Patients’ demographics and medical characteristics were assessed by reviewing the patients’ charts. Degree of sedation and recovery were assessed by the Ramsay’s sedation scale and the Aldrete score, respectively. Result : The mean recovery time was 37.8±16.9 minutes(range, 5 to 90 minutes). Hypoxia was present in four clients during recovery. Alcohol intake(p=0.02) and pulmonary function(p=0.003) were significant factors affecting recovery time, whereas midazolam dose and sedation level were not. Conclusion : Current alcohol intake, pulmonary function were predicting factors on recovery time.