附睾(Epididymis)是一个多数曲折、细小的管子构成的器官，一面连接着输精管(Ductus deferens)，一面连接着睾丸(Testis)的曲细精管。当精子离开睾丸时，就跑到附睾里，继续生长成熟。

The epididymis (/ɛpᵻˈdɪdᵻmɪs/; plural: epididymides /ɛpᵻdᵻˈdɪmədiːz/ or /ɛpᵻˈdɪdəmɪdiːz/) is a tube that connects a testicle to a vas deferens in the male reproductive system. It is present in all male reptiles, birds, and mammals. It is a single, narrow, tightly-coiled tube (in adult humans, six to seven feet in length) connecting the efferent ducts from the rear of each testicle to its vas deferens.