In order to investigate the pharmacokinetics of propofol, 8 adult patients, ASA grade Ⅰ-Ⅱ, scheduled for elective operation under general anesthesia,served as the subjects. After the injection bolus of propofol 2mg?kg~_(-1) was given, the venous blood samples were taken at various times to measure the plasma concentrations of propofol by high performance liquid chromatography. The data were analysed using PKBP-NI program. The results showed that the disposition of propofol was mathematically described by three compartment open motile, the distribution was rapid and extensive with slow balance among three compartments,and the eliminative duration was short. It is indicated that propofol is applicable for both induction and maintenance of anesthesia.