Purpose of the study. Determining the value of ECG-stress-test results by treadmill for the stable coronary heart disease (CHD) diagnosis in patients aged 70 years and older. Material and methods. There were included 390 patients of both sexes aged 70 and older, who was hospitalized with suspected stable coronary artery disease and were underwent coronary angiography (CAG). Electrocardiographic stress-test using the modified Bruce treadmill protocol was conducted in 189 (48%) patients, 34 (18%) patients had typical angina, 122 (65%) had atypical angina, 33 (17%) had chest pain that was not angina. According to stress-test and CAG results, sensitivity, specificity, predictive value of a positive (PV+) and negative (PV–) result were calculated, the ratio of predicting accuracy of positive (PA+) and negative results (PA-) of coronary atherosclerosis diagnosis in patients with atypical angina and non-anginal chest pain. Results. The test was not brought up to the diagnostic criteria in 83 (54%) patients out of the included 155 patients with atypical angina pectoris and non-anginal pain. Only 38 (53%) patients out of the 72 patients in whom the sample was brought up to the diagnostic criteria for ECG, had a stenosing lesion of the coronary arteries. In 30 of them, the stress-test was positive, in 8 cases it was negative. The sensitivity of the stress-test in the diagnosis of coronary atherosclerosis was 79%. Thirty-four (47%) patients out of the 72 patients, whose stress-test was brought to the diagnostic criteria, did not have stenosing coronary artery disease. In 28 of them, the sample was negative, in 6 patients it was positive. The specificity of the sample was 82%. PV+ test result was equal to 83%, PV– test result — 78%. The PA+ result was equal to 4,4, the PA– result was 0,3. A positive test result increased the presence of stenosing coronary atherosclerosis from 53% to 83%, a negative result reduced the probability to 25%. Conclusion. The sensitivity of the ECG stress-tests in the coronary atherosclerosis diagnosis in patients aged 70 years and older with atypical angina and non-anginal pain was 79%, specificity — 83%. The probability of obtaining a positive test result in patients with coronary atherosclerosis in comparison with patients without it is 4,4:1, a negative result is 1:3,3.