The fundamental objective underlying extension service of Rafhan Maize Products Company is to disseminate information among maize growers, so that they can improve the quantity and quality of maize crop. In this research project the effectiveness of extension education methods used by Extension Field Staff (E. F. S.) to transfer information to maize growers, was studied. The study was administered in Central Punjab. The data were collected from 120 growers through personal interviews. The findings manifest that Group discussion was found to be the most effective extension teaching methodology followed by Lecture and Demonstration. Telephone call was ranked at 4th position. Literature, Farm and home visit and Farmer’s day were ranked at 5th, 6th, and7th spot, respectively. Sign boards/ Slogans, Campaign and Electronic media (Radio and TV) were not found to be used by any farmer.