A neural tube capable of complexly playing roles of a support for regenerating a nerve and a nerve electrode has a support connected to a terminal of an injured nerve, and a sieve electrode having an electrode hole formed in a body thereof and a circular electrode formed around the electrode hole, wherein the body of the sieve electrode is buried in the support, wherein a cavity-type channel is formed at the support to extend to the inside of the support, wherein the electrode hole is aligned with the channel, and wherein a nerve cell growing along the channel at the terminal of the injured nerve is capable of contacting the circular electrode.