To provide an adjuster nut body used in a leg end part of furniture, or the like, which can be easily produced and simply recycled.

This adjuster nut body is so constructed that an adjuster body with a nut has an outline formed to be fitted and fixed to the interior of the end part of a leg made by a substantially round pipe or a deformed pipe in a leg part of a desk, a chair or a table as furniture to mount an adjuster bolt or a caster, an adjuster body made of synthetic resin, or the like, is provided with a flange part and a through hole in the interior thereof, the through hole is provided with an insert part and a space part for inserting and mounting a nut body from the outside, the space part is provided with a pressing rib part for the nut body, and the outer peripheral part of the pressing rib part is pressed and fitted to the inside of a leg end member.