This book on Path Factorization Of Graph has been specially written according to the latest trends on Graph Theory. The subject matter of the book has been discussed in such a simple way that the reader will find no difficulty in understanding it. The proofs of various theorems and related examples have been given in minute details. Each chapter of this book contains a complete theory and a sufficient number of references at end of each section. The author has tried his best to keep this book free from a misprint. The author in general hopes that the present book will warmly be received by the students, researchers, and teachers.