Abstract: A plurality of tiles arranged as a set the same as are pasted onto a wall or floor are integrally connected with one another by pasting rectangular connecting pieces made of such sheet materials as of paper, cloth or resin film onto the back surfaces of the tiles to bridge two adjacent tiles with each other. The connecting pieces are obtained by cutting fixed lengths off the long tape-shaped materials. The connecting pieces thus cut off are sucked by suckers, are fed to a set of tiles conveyed as mounted as inverted on a conveyor and are pasted by a bonding agent onto the back surfaces of two adjacent tiles to bridge them with each other.