This book exclusively covers the topic on oscillation theory of second order functional impulsive differential equations. It is written by authors who are in this field for the past three decades. This book contains several results regarding the oscillation of different types of second order impulsive differential equations reported in the last ten years. Many examples are provided in each chapter to illustrate the importance of the main results. Its step by step expositions are easy to the readers to understand the results and examples on the oscillation theory of impulsive functional differential equations.