Background of the study: Wide information of the anatomy of coronary arteries is useful for a management decisions of the coronary artery disease or for systemic planning of surgery. The objective of this study is to establish variations of Conus coronary arteries which arise directly from aorta and revealing about their frequency .These findings would be of great significance in the interpretation of coronary arteriography, angiography and surgical myocardium revascularization. Methods: A total number of 111 angiograms were utilized for this study. The coronary angiographic images were evaluated in this study. The study is design to investigate the number by the mean of origin of right conus artery. Results: The results shows the right conus artery originates from right coronary artery in most of the people 77(69.3%). In this study right conus artery originate from same ostium in 15(13.5%) individuals and from Separate ostium (aortic) origin were seen in 18(16.2%). Conclusion: A selective Angiography is recommended for conus artery because the frequency of conus artery as the third coronary artery is 29.7% of screened cases of Cat-scan coronary angiography (CTA).