A novel Gas Chromatographic (GC) method has been developed for the quantitative estimation of Lamotrigine (LMT) in bulk drug and pharmaceutical dosage forms. Ethyl chloroformate (ECF) was used as a precolumn derivatizing reagent. GC separation was carried out on an Rtx-5 capillary column (cross bond 5% diphenyl/95% dimethyl polysiloxane) with a length of 30 meters and an internal diameter of 0.25 mm with flame ionization detector. The elution was carried out at an initial temperature of 80˚ C for 4 minutes and temperature increased at the rate of 100˚C/min up to 180˚C for 5min. Column pressure was programmed as 29.8 Kpa for 3.5 minutes and pressure increased at rate of 20Kpa/min up to 120Kpa for 4.50 minutes. The linear calibration ranges for LMT was observed between 2- 10 ng/ml. The method was subsequently applied to the determination of LMT in pharmaceutical preparations. The relative standard deviation (RSD) was found to be 0.17%. The recovery studies were done and the percentage recovery of LMT was found to be 97.86%.