Background: The aim of our study was to assess the effect of pretreatment with cilostazol and rosuvastatin combination before elective percutaneous coronary intervention (PCI) on peri-proceduralmyocardial injury (PPMIJ). Methods: We randomly assigned 172 patients with stable angina pectoris scheduled for elective PCI to pretreatment with Cilostazol 200mg and Rosuvastatin 40 mg (group 1), or to pretreatment with Rosuvastatin 40 mg group (group 2). The primary end-point was the occurrence of PPMIJ defined as any cardiac troponin I (Tn I) level elevated above the upper normal limit (UNL). The occurrence of peri-procedural myocardial infarction (PPMIN) was defined as a post-procedural increase in cTnI level  5 times above the UNL. Results: There was no significant difference in baseline characteristics between group 1 (n = 86) and group 2 (n = 86). The rate of PPMIJ (21% vs. 24%, p = 0.58) and PPMIN (2.3% vs. 7%, p = 0.27) were similar between the two study groups. Subgroup analysis performed on those patients without statin therapy before PCI (53 patients in group 1 and 50 patients in group 2) showed that the incidence of PPMIJ was significantly lower in the group 1 patients without chronic statin treatment [17% (9/53) versus 34% (17/50); p = 0.04], but the rate of PPMIN was similar between the two groups for those patients without chronic statin treatment [1.9% (1/53) versus 10% (5/50); p = 0.07]. Conclusions: We found that adjunct cilostazol and rosuvastatin pre-treatment did not significantly reduce PPMIJ after elective PCI in patients with stable angina pectoris. However, adjunct cilostazol pre-treatment could reduce PPMIJ in patients without chronic statin therapy before elective PCI.