Introduction: Testicular damage is one of the most deleterious effects whenever cisplatin (CP) is employed in cancer treatment. CP results in male infertility. L-carnitine (LC) is a vitamin-like substance with antioxidant activity. L-carnitine improves spermatogenesis, sperm maturation and motility.Aim of the Work: Assess the protective role of LC in cisplatin-induced testicular toxicity.Material and Methods: Forty adult male albino rats (200-250 grams each) were divided into four groups. The first group is control. Group II: LC was intraperitoneal (IP) injected (500 mg/kg/d) for fifteen days. Group III: CP was injected with only one dose of 7 mg/kg CP (IP) on the 6th day. Group IV: LC plus CP received treatment of both groups II and III. Semen analysis was performed to estimate sperm count and motility. Testicular sections were examined under light microscopy using H&E, PAS, and anti-inducible nitric oxide synthase (iNOS) stainings. A transmission electron microscope was also done.Results: Cisplatin caused a significant decline in the body weight, absolute and relative testicular weight, sperm count, sperm motility, seminiferous tubular diameter, and germinal lining height in relation to other groups, with a significant improvement in the CP plus LC group. Specimens from CP-treated animals showed thick and destructed seminiferous tubules (ST) basal lamina, obvious disorganized and atrophied ST, spermatogenic arrest, and atrophied Leydig cells. LC improves these changes with variable preservation of spermatogenic cells. Inducible NOS staining in the CP-treated group showed a moderate positive reaction, other groups showed a negative or weak reaction. Transmission electron photomicrography of the CP group showed large cytoplasmic vacuoles, small distorted mitochondria, and large lipid droplets in most spermatogonic cells; abnormally shaped spermatozoa. Conclusion: L-carnitine partially attenuates CP-related histological changes of the testicular tissue and improves the quality parameters of the sperm, ensuring the protective effect of LC.