Abstract: A tile application backing material is disclosed having as an object thereof to greatly simplify tile allocation, positioning, and affixing and the like, and to strongly affix tiles and backing material to a laying surface; in order to achieve this object, this tile application backing material is formed with a plurality of frame members disposed extending along sides of tiles having a polygonal shape, said frame members being connected at mutual points of intersection; these frame members comprise a base portion which is in contact with a laying surface and dividing plate portions which are disposed thereabove. By means of this, after allocation has been determined by means of this backing material, in a state in which this backing material is temporarily attached to a laying surface to which tiles are to be applied, adhesive is allowed to flow into a plurality of regions demarcated by means of the dividing plate portions and by means of the inlaying of tiles, tile application is easily accomplished.