Traffic accidents are still the the most frequent death fatality that can cause of death, there are 85% of incidents of which 1.3 million deaths and 20 to 50 million suffer injuries, the most common cause of death is thoracic trauma, from data obtained by trauma thoracic is the third largest cause of death after cardiovascular disease and cancer, in the Mabes Polri data every year there were around 68.29% in 2010-2016 and around 9,856 people who died of traffic accidents and the most frequent victims were men, accidents that cause trauma to the thorax can cause fractures of the sternum, ribs, and clavicle bones. The goal of this study is to determine the number of traffic accidents that cause thoracic trauma by means of data collection at RSUD TARAKAN in 2017, the design of this study uses a retrospective descriptive design with a cross-sectional approach, the taking technique in this study by taking total sampling techniques. The population taken in this study were all patients diagnosed with thoracic trauma caused by a traffic accident. The results of this study obtained 767 samples experiencing traffic accidents, and in getting 24 samples who experienced thoracic trauma, with results 21 people were male (87.4%), and 3 people were female (12.5%), with age categories there are 3, older than 40 years old 15 people (62.5%), while ages 17-40 years 7 people (29.2), under 17 years old 2 people (8.3%), motor vehicles 5 (20.8%), vehicles 19 (79.2%), fracture 12 (50%), fractures 12 (50%), and sternum fractures 0%, the conclusions that were obtained by male types of males were more experienced traffic accidents, the most types of vehicles were cars, and for diagnosis were obtained sternum fractures and clavicle fractures with the same results.