Introduction: Endothelial progenitor cells (EPC) have a role in the maintenance and promotion of vascular repair and are negatively correlated with coronary atherosclerosis. Goal: To culture of EPC-CFUs during coronary atherosclerosis, evaluate endothelial nitric oxide synthetase (eNOS) enzyme levels in the culture. Materials and Methods: The 10 ml blood was drawn from the peripheral vein of 12 man patients that stable angina 4, acute myocardial infarction (AMI) 4 and healthy people 4. Peripheral blood mononuclear cells were isolated by Ficoll density-gradient centrifugation and EPC-CFUs was assayed after two platings and a 6 day culture on fibronectin coated, 72 well plates, as described. eNOS enzyme titers were determined by ELISA according to the protocol in the cells culture. Results: The people were 52±2.12 years. The number of EPC-CFUs increases with accordance of patients with stable angina, AMI, healthy people with the statistical significance (F=17.3, p<0.001): stable angina (2.6±0.47 colony/well), AMI (6.7±0.81 colony/well), healthy people (10.5±1.34 colony/well). Furthermore, ANOVA test of eNOS enzyme levels in patients with stable angina (5.2±0.61 pg/ml), AMI (8.7±1.49 pg/ml) and healthy people (13.7±2.48 pg/ml). The significant difference (F=6.2, p=0.003) was observed among the three groups. The number of EPC-CFUs had direct significantly correlation (r=0.621, p<0.001) with the eNOS enzyme levels of this culture. Conclusion: Number of EPC-CFUs and eNOS enzyme levels decrease at patient with stable angina, indicate more than endothelial dysfunction. Ethical approval The ethics committee of Mongolian National University of Medical Sciences (ID: 6/3/201506, approved on Jan 01, 2015)