Designing a methodological guide for work in confined spaces ranging from information and instruction in the use and application of work permits, safety plans and emergency plans to help create a culture of prevention of accidents in workers exposed to work in spaces confined , all this in turn contributes to the risk management organization , to improve the working conditions of its workers and most importantly their safety and health is ensured , through the identification of occupational hazards to which exposed , reviewing existing regulations and collection of secondary sources on safety in confined at national and international level to contribute to the construction of a methodological guide that may help mitigate the occurrence of accidents in confined spaces.