This study developed a model for depicting the phenomenon of communication in extension education in the developing nations, with emphasis on the role of extension communicators in such settings. The present model was formulated on the basis of existing ones, then was compared with the actual situation as found in the literature on communication and on diffusion of agricultural innovations. Elements of this model include the communicator, his aims, and the handling of the message; specific channels of communication; the motives and response of audiences or receivers; and subsequent action taken, along with consequences. Such communication is represented as intentional, specific, highly planned, and continuous, occurring on a social and interpersonal level and in a physical and social environment, and consisting of two interdependent subprocesses (sending and receiving) which run parallel but do not necessarily start simultaneously. (author/ly)