Abstract: The present invention relates to a disc for abrading which is fitted to an electrically driven tool and is able to freely abrade flat surfaces and curved surfaces. And provided is a disc for abrading flat surfaces and curved surfaces, wherein the disc comprises: a holder of a plastic material, which rotates following the coupling of the electrically driven tool into a coupling hole formed in the centre thereof; a disc-shaped abrasive-fabric assembly formed by stacking layers of a plurality of abrasive-fabric pieces circumferentially along the edge of the holder; a resin layer for integrally linking the holder and the abrasive-fabric assembly; and a circular curving part which is formed between the edge of the holder and the edge of the abrasive-fabric assembly, and wherein the curving part can flex along the surface of a material to be abraded, so as to freely abrade a flat surface or curved surface of the material to be abraded.