This book is mainly meant for under-graduate and post-graduate studies in extension education, and is intended to serve as a text book in extension education, in Agriculture, Home Science, Veterinary and Animal Sciences, Fishery, Forestry, Sericulture etc in the universities, colleges and institutes. It shall be beneficial in the relevant Government Departments, Corporations, Banks, Cooperatives, Non-Government Organizations, Input agencies, and in their training centers, as well as in research Institutes and Krishi Vigyan Kendras, in respect of their extension work. Persons engaged in Rural Development, Transfer of Technology, Communication, Journalism and in various other fields of activities like Distance education, Open university system of education, making the people environment conscious etc shall find the book useful. India is a vast country with varied types of people and with varied types of people and with a rich experience of extension over many decades. The developing countries shall be enormously benefited by India's experience in extension education, because, socio-culturally and technologically India is closed to them than the developed countries.