Aim: Trauma with high mortality and morbidity rates, especially in young patients, is an important health problem all over the world.To make prehospital triage easier and to predict the in-hospital mortality of severe trauma patients, some triage scores and decision algorithms have been improved.There are many prehospital trauma scores that evaluate anatomic variables, physiologic variables, or a combination of both.Some of them are trige-RTS, NTS and MGAP.The aim of this study was to compare prehospital trauma scores to predict in-hospital mortality of trauma patients.Material and Methods: This study was conducted in the capital's training and research hospital between 01.06.2018 and 31.12.2019.Patients older than 18 years of age, admitted to the emergency department due to multiple traumas by ambulance were evaluated retrospectively.Triage revised trauma score (RTS), NTS, GCS and MGAP scores were evaluated.Results: One hundred patients who met the criteria were included in the study.Seventy-eight of the patients were male, and mean the age was 46.52±19.36years.Eighty-eight of the patients had blunt trauma and 31 of them died.ROC analyses were performed for prediction of mortality.The MGAP score with a cut-off value of 11 had highest sensitivity of 95.59%.NTS scores with the highest AUC value were found to be the strongest predictor of mortality.Discussion: This study, which compared prehospital trauma scores to predict in-hospital mortality of trauma patients, has shown that with proper cut-off, all scores (GCS, RTS, NTS and MGAP) had similar predictive values.New Trauma Score might be a better option for the prediction of mortality in a pre-hospital setting.The results of this original study showed that NTS predicted in-hospital mortality better than RTS and was not inferior to MGAP.NST score had a sensitivity of less than %95 at our new cut-off point, either than choosing a lesser point for cut-off to increase sensitivity.