Disclosed is a buoyant for eyeglasses. The disclosed buoyant for eyeglasses comprises: a body having buoyancy; an eyeglasses mounting unit provided to a body to couple the body and eyeglasses; and a sign unit provided to the body. The buoyant for eyeglasses is able to prevent the eyeglasses from being sunk during water activities as the buoyant for eyeglasses is mounted on the eyeglasses.