[en] The course handbook on radiation protection, technical level, prepared by scientists of the Nuclear Regulatory Authority (ARN) of the Argentina Republic, describes the subjects in 22 chapters and 5 annexes. These topics detailed in the text have the following aspects: radioactivity elements, interaction of the radiation and the matter, radio dosimetry, internal contamination dosimetry, principles of radiation detection, biological radiation effects, fundamentals of radiation protection, dose limits, optimization, radiation protection and its organization, radioprotection to the public, radiation protection fundamentals for interventions, radiation shielding, contamination protection systems, radioactive waste management, criticality accidents, safe transport of radioactive materials, X-rays, regulatory aspects, industrial and medical applications of radiation, quality systems