1. The myocardial bridges on the coronaty arteries of 100 hearts were studied.These formations occur in 66.3?4.76% of the cases and were located as follows: (1) On the left coronary artery: 60.0?4.98% was found on the r. interventri-cularis ant.; 6.1?2.41% on the r. obliquus ventriculi sin.; 1.0?1.00% on the r. ter-minalis; 9.1?2.90% on the r. marginalis. (2) On the right coronary artery: 10.0?3.00% on the r. interventricularis post.;5.0?2.18% on the r. anteriores ventriculi dex.; 3.0?1.71% on the r. marginalis. (3) The rest: 3.1?1.76% on the v. cordis magna; 1.0?1.00% on the v. cordismedia. 2. Microscopic examination of 5 hearts showed that the myocardial bridge is a partof the superficial myocardial layer. 3. The result were discussed with those from other authors.