This textbook gives a thorough idea of ​ ​ the profession of a piano master. The first chapter contains a historical retrospective on the forerunners of the piano and grand piano. This book introduces students to the acoustic unit and details of mechanics. It describes how the resonant deck is repaired, how the bass strings are wound, how they are mounted, how the broken hammerstiels are repaired, and how the hammers are replaced. Each chapter contains tables with technical data. An entire chapter is devoted to materials and the manufacturing process.