Aim: To investigate the relationship between androgen level and the indexes indicating endothelial function in male patients with coronary heart disease (CHD). Methods: We registered the following data for 106 50-70-year-old men:age, weight, blood lipid, including total cholesterol, low density lipoprotein cholesterol, high density lipoprotein cho-lesterol and triglyceride, whether a smoker, sugar levels, blood pressure, free testosterone (FT), vascular cell adhe-sion molecule-1 (VCAM-1) and the intima-media thickness (IMT) of common carotid artery, common carotid diameter,maximum velocity in systolic phase, minimum velocity in diastolic phase and resistent index. Among the 106 men, 51 were patients with CHD. The relationships between FT level, VCAM-1 concentration and IMT were examined,respectively, using a stepwise linear regression technique among all the 106 men. Results: There was no statistical difference in terms of age, blood pressure, whether a smoker, sugar levels, HDL-C, minimum velocity in diastolic phase, resistent index between male CHD patients and controls; whereas results for weight, total cholesterol, low density lipoprotein cholesterol, triglyceride, VCAM-1 and IMT of male CHD patients were higher than those of controls; FT level and maximum velocity in systolic phase were lower. It was found that among all the objects, FT level was inversely correlated with IMT and VCAM-1 concentration. Conclusion: FT level was inversely correlated with VCAM-1 concentration and IMT which are indicators of endothelial function.