Coronary arteries aneurysms are rare occurring abnormalities, concerning mostly right coronary artery. We present a case of a 60-year old man who underwent magnetic resonance (MRI) due to suspicion of cardiac tumor in the previously performed echocardiography. MRI examination suggested right coronary artery aneurysm. The diagnosis was confirmed in the performed computed tomography (CT) and additionally coronary aneurysm of distal part of right coronary artery was visualized.