The text represents the efforts of the authors to provide a meaningful text for students and practitioners who are interested in learning the theories and concepts of the Financial Institutions and Intermediaries. The book was structured and arranged to cover the following chapters: Chapter One: Introduction of Financial Markets; Chapter Two: Financial Instruments; Chapter Three: Financial Institution in Nigeria; Chapter Four: International Financial Institutions; Chapter Five: Operating Forces of the Financial Environment; Chapter Six: Sources and Cost of Short-term Funds; Chapter Seven: Sources and Cost of Medium-term Funds; Chapter Eight: Sources and Cost of Long-term Funds; Chapter Nine: Short-term uses of Funds; Chapter Ten: Financial Intermediation. This text is therefore recommended to students, financial consultants, practitioners and etc. that need a reference material in the area of Financial Markets, Institutions and Intermediaries.