Diabetic population still remains a challenging subgroup of patients for percutaneous coronary intervention (PCI). However, with rapid advancements of PCI techniques, devices and adjunctive drug therapy, clinical outcomes for diabetic patients after PCI have markedly improved. The plethora of recent encouraging data with newer generation drug-eluting stent (DES), with a lower frequency of major cardiac adverse events, lead to an increasing use of DES in this particular high-risk population. However, diabetes remains an important risk factor for coronary events, even in the DES era. This review summarizes the outcomes in diabetic patients undergoing PCI with DES implantation.