Coronary pseudo-lesion is an artificial lesion that occurs during percutaneous transluminal coronary angioplasty by an angioplasty guide wire and/or a balloon as a result of a straightening of the vessel curvature. A specific treatment is not required and the condition is completely resolved after removing the angioplasty wire. There are few reports about a pseudo-lesion, particularly in the left circumflex artery. We report two cases of a coronary pseudo-lesion induced by an angioplasty guide wire; one case affecting the left circumflex artery and the other affecting the right coronary artery.