This book introduces solution plasma chemistry. The reaction field realized by solution plasma is a non-equilibrium state which inherits the characteristics of both conventional solution chemistry and plasma chemistry. By using this reaction field, it is possible to easily realize the process of new organic synthesis, reduction of metal ions, nanoparticle synthesis, nanocarbon synthesis, and surface treatment and thin film treatment on powders. In this book, various examples of such materials synthesis are shown. This book is useful for graduate students to study the basics of solution plasma chemistry and its applications.