The human anatomy, the main basic science, is the language of medicine; and represents the main inlet for all medical sciences; either basic or clinical. This book of thorax anatomy is written in simplified language to be rapidly reviewed and easily understood. It is supplemented with simple hand-drawing diagrams as well as some photographs. The basic knowledge is followed and correlated with clinical points. It is mainly written for undergraduate medical students, health staff members and doctors especially of the related specialties such as chest physicians and cardio-thoracic surgeons. In addition to bones of thoracic cage, full account has been given about the different regions of the vertebral column to clarify their differences.