This book is intended to be used by under graduate students of Agricultural Engineering, Agriculture and allied discipline of different Agricultural Universities in the country. The concepts in this book are explained with simple language. Hence this book can be used by the diploma student of agriculture, and polytechnic. Book covers all about the tractor viz. Different systems in tractor, principles of working of systems, and different components. The last part of each topic covers the maintenance and troubleshooting. It also covers the topics based on modern trend. This book is based on syllabus recommended by Vth Dean’s Committee of IndianCouncil of Agricultural Research, New Delhi. The efforts are made to explain the concepts through number of figures.