Introduction: - In Ethiopia comprehensive Pre-hospital emergency medical system is practically non-existent. A comprehensive emergency medical system includes not only a health facility based care for emergency cases but also a functional pre-hospital care that gives primary care for injuries at the accident scene and while transferring victims to health facilities. Traffic police personnel are the first respondent to road traffic accidents. The objective: - Assessment of Knowledge, Attitude and Practice to ward first aid related to road traffic accidents among traffic police in LIDETA, KIRKOS and ARADA sub city of Addis Ababa Ethiopia. Method: A cross-sectional quantitative study was carry out among traffic police working in LIDETA, KIRKOS and ARADA sub city of Addis Ababa, Ethiopia from February 3-18, 2014, using a convenient sampling technique. 150 police traffic was participated and responded for open- ended and close- ended questions and 120 were analyzed. Result: Participants were 120 (92.3%) male and 10(7.7%) female with an average age of 27 ±7.42 (SD) with a range from 23 to 50 years. One hundred and eleven (85.4%) were trained previously on first aid from different institution. Forty two (32.1%) were identified noisy breathing which is a sign of air way obstruction. Most participants‘ first action during first aid was only transfer to near hospital, furthermore 128(98.5%) believed that it is necessary to give first aid immediately for RTA victims, but some them had not willingness to give first because of fear infection, shortage of materials and didn‘t had full skill. Conclusion and recommendation: In This study identified baseline knowledge, practice and perspective of first aid related to road traffic accident of traffic polices who are working in ARADA, LIDETA and KIRKOS sub city of Addis Ababa Ethiopia, and showed that there was gap on knowledge and practice of first aid for RTA victims, on the other hand respondents gives a positive believe related to application of first aid at scene. Would been providing continuous training and demonstration of moderate level of knowledge, attitude and practices towards first aid related to firs aid further collaboration with governmental and non-governmental institutions