This study investigates the possibilities of productivity gains and the technical efficiency of maize farmers in the Mekong Delta (MD), Viet Nam. Using the stochastic production frontier measures such technical efficiency and productivity. The study using the survey data in the two provinces locating in the MD reveals that there was a wide range of variation in technical inefficiency. The latter mainly stems from experience and training participation of maize farmers. The study suggests that there is an opportunity to increase the technical efficiency level of the maize crop in the MD by enhancing the technical guidance of new technologies in maize production through launching several trainings to farmers.