Background: Etoposide is a popular chemotherapeutic agent that causes a massive oxidative stress and reproductive toxicity effect in male patients. Objective: Examined the protective properties of cinnamon alcoholic extract (Cinnamomum zeylanicum) to etoposide-induced testicular damage in male Wistar rats. Methodology: Forty adult male rats were randomly separated into four groups namely control, cinnamon extract, etoposide extract, and etoposide extract combined with cinnamon extract. The parameters of the hormones studied were testosterone, luteinizing hormone (LH) and follicle-stimulating hormone (FSH), testicular tissue histology, and molecular evidence of oxidative stress. Results: Findings revealed that cinnamon extract had an important ameliorative effect against etoposide induced hormonal imbalances, maintained testicular histoarchitecture, mitigated oxidative stress indicators as well as augmented antioxidant enzyme functions. Such findings imply cinnamon alcoholic extract has strong antioxidant and protective effect on chemotherapy-induced reproductive toxicity, and can be used as a potential therapy to preserve male fertility during cancer therapy. Conclusion: The alcoholic extract of cinnamon (Cinnamomum zeylanicum) offers great protection against the etoposide induced testicular damage in the male Wistar rats through intensive antioxidant action. These results propose cinnamon extract as a promising, safe adjuvant treatment in preserving male fertility in cases of chemotherapy.