PROBLEM TO BE SOLVED : To provide an agent for reducing in-blood uremic substance having the action of reducing (decreasing) the concentration of in-blood uremic substance effectively, and an agent for preventing or improving uremia.SOLUTION : An agent for reducing in-blood uremic substance contains a compound illustrated by the following formula as an active ingredient, and is orally administered.SELECTED DRAWING : NoneCOPYRIGHT : (C)2019, JPO&INPIT