A 77-year-old man with unstable angina pectoris showed severe coronary stenosis with soft plaque in the left anterior descending coronary artery (LAD) as detected by 64-multi-detector row computed tomography (MDCT). Percutaneous coronary intervention (PCI) with a bare-metal stent to the LAD was performed, and stent fracture immediately after PCI was clearly detected by MDCT. MDCT may be useful for identifying a fractured stent and for management after stent implantation.