This book attempts to cover the basic aspects of the electrical resistivity techniques. It includes a short introduction to electrical resistivity method and trying to provide a brief summary of the past and ongoing development for the techniques of this method. Presentation of the resistivity method is started always with the basic theoretical background, field measurement procedures, data processing, and interpretation, for one or more of the techniques of this method. Therefore, this book designed to cover all resistivity techniques with the most important studies that led to the development of these technologies and their applications.