To provide a runner employing a divided runner fastening method not requiring installation of a cover plate.

This divided runners 1A, 1B are formed by dividing the runner into two or more by a vertical plane passing through the center of the runner of a water wheel or a pump water wheel. Each of the divided runners 1A, 1B includes: a divided joint surface 5 oppositely facing the other divided runner when integrally fastened; fastening grooves 6, 7, 8 formed in the divided joint surface 5 on the side of a crown 2 and on the side of a band 3; and a fastening member fitted to the fastening grooves 6, 7, 8 and having a hooking 13 parallel to the divided joint surface 5. The hook 13 fastens the fastening grooves 6, 7, 8, thereby the divided runners 1A, 1B are fastened to each other.