The industrial security in the building sector is defined as the group of preventive measures dedicated to the identification and control of the causes which generate accidents and put in danger the life of the workers, the materials and the equipments in the work as well. The workers of building sectors are very vulnerable to have work accidents in the different contructive processes because when they do what they were hered for, they are in permanent contact with elements and situations which generate risk for them. The objective of this exploratory study was to establish the grade of accident in this field in the city of San Juan de Pasto by having like base the legal frame that regulates the subject. The obtained results demonstrate that there is the need to inform and to quality all the people related with the contruction of civil works about the importance of taking care of the main resource any company can have which is the human resource.