[Objective] The research aimed to study the male reproductive system of Tenebrio molitor.[Method] The paraffin sections and HE staining methods were used to observe the testicles and pisolitic accessory glands tissue of adult male Tenebrio molitor.[Result] The results showed that the male reproductive system of Tenebrio molitor consists of a pair of testis,a pair of tubular accessory glands,a pair of pisolitic accessory glands,a pair of the vas deferens and an ejaculatory duct.The spermatogenesis of Tenebri...