Aim The aim of this study is to evaluate the antioxidant effect of p-Coumaric Acid (p-CA) on tissue damage due to ischemia-reperfusion in rat kidney tissue. ( Sakarya Med J 2018, 8(3):625-631)Methods Thirty-two 12-16 week-old Wistar Albino female rats weighing 200-250 g were used in this study. Rats underwent right nephrectomy intraperitoneally with an incision made in the dorsal region under ketamine (75 mg/kg) and xylazine (8 mg/kg) anesthesia. These rats were randomly divided into four groups in equal numbers (n = 8). Groups were classifi ed as the sham (S), renal ischemia-reperfusion (R-IR), 50 mg/kg p-CA with R-IR (p-CA 50), and 100 mg/kg p-CA with R-IR (p-CA 100). After the dorsum of all rats was opened and the right nephrectomy was performed, all groups except sham were clamped on the left renal artery and ischemia and reperfusion protocol was performed. P-CA was administered in two doses, 60 min before ischemia and 30 min before reperfusion. Total antioxidant levels (TAS), total oxidant level (TOS), superoxide dismutase (SOD), malondialdehyde (MDA), and myeloperoxidase (MPO) levels of left kidney were measured spectrophotometrically, and oxidative stress index (OSI) was calculated.Results TOS, MDA, MPO, and OSI values increased in R-IR group compared to S (p <0.01), while TAS and SOD values decreased. Increase in TAS and SOD values, a decrease in TOS, MDA, MPO, and OSI values were observed in P-CA applied groups (p <0.05).Conclusion Our fi ndings indicate that p-CA administration in renal ischemia-reperfusion injury may play a role in protecting tissue by reducing oxidant damage.