Objective: The goal of this rare case report was to investigate potential factors that could contribute to testicular metastasis of bladder urothelial carcinoma. Methods: A retrospective analysis of the clinical data of a male patient who had a left testicular metastasis of bladder urothelial carcinoma after transurethral resection of bladder tumour and a series of chemotherapy in our hospital and review of related literature. Result: The patient was treated with left testicular radical resection, followed by confirmation of the disease with immunohistochemistry and pathology. After follow-up for 8 months, the patient died of systemic metastasis. Conclusion: Testicular metastasis of bladder urothelial carcinoma is very rare and it is more likely to occur on patients with older age, prostate metastasis and chemotherapy history. Especially, repeated bladder irrigation, transurethral surgery, high-tension bladder, and long-term chemotherapy are significantly associated with this rare case.