Spontaneous coronary artery dissection (SCAD) is a rare disease that occurs most commonly in young people, especially in peripartum or postpartum women. It is usually catastrophic and fatal. The etiology of dissection is still under discussion. Possible factors are inflammation, changes of flow dynamics, and preexisting intima lesions. The treatment of choice for spontaneous coronary artery dissection is still not settled. The authors report a twenty-nine year-old woman with coronary lesions diagnosed as spontaneous coronary artery dissection which developed during exercise and was treated with intracoronary stenting.