Bilobed testicle is a very rare congenital malformation with an unknown etiology. Herein, we report an 18-year-old boy presented with a right-bilobed testicle mimicking a testicular tumor. The present case highlights the importance of considering bilobed testicle as a valuable differential diagnosis of testicular mass to prevent unnecessary surgery. Furthermore, the case could provide more information about presentation and management of bilobed testicle.