Purpose: In this study, we used multidetector computed tomography (MDCT) to detect myocardial bridge and evaluate the anatomical properties of it. Methods: 64-slice MDCT was conducted on 666 patients suspected with coronary artery disease. Myocardial bridge was diagnosed when an intramural segment of a coronary artery was visualized on axial and multiplanar reconstruction (MPR) images. Results: Among the 666 patients, 38 patients(6 %) were found to have myocardial bridge. In nineteen patients (50%), myocardial bridge was located in mid left anterior descending artery (LAD). And in thirteen patients (34%), the MB was located in the proximal or distal LAD. The length of tunneled artery was mean 16���, from 6.9��� to 30���. And the maximum thickness of myocardial tissue was between 0.5���and 3.9���, with mean of 1.8���. The length of MB was significantly correlated with their thickness (p < 0.05). Although most of intramural segment was free of coronary wall lesions, arterial segment immediately proximal to the myocardial bridge had atherosclerotic plaque in 10 of 38 cases (26%). The presence of atherosclerotic plaque in the proximal to the myocardial bridge correlated with the thickness and length (p < 0.05). Conclusions: In our study, we described the incidence of the myocardial bridge and its anatomical properties with MDCT. The MDCT is a useful and noninvasive tool for evaluating myocardial bridge.