To remove thermal stress developed on a roll with a simple structure when a wire rod is conveyed.

This roll 1 is composed of a rotating shaft 4, a metal-made first sleeve 2 fitted to this rotating shaft 4 and a ceramic-made secondary sleeve 3 fitted outward to this first sleeve 2. On the above rotating shaft 4, an impeller 5 is fitted to at least one side surface side of the first sleeve 2 and the second sleeve 3.