To enable an uneven and engraved natural stone to be strongly bonded to a concrete block under pressure without damaging and breaking the natural stone and facilitate the automation of a bonding operation.

A block receiver 1 is structured of a slightly hard foamed urethane elastic body 1b with 2.5 cm thickness applied in a square O-shaped fashion on the upper face of an iron plate block receiving plate 1a. Further, a natural stone 3 is placed on the elastic body 1b of the block receiver 1 in such a manner that the uneven and engraved face of the natural stone 3 is brought into contact with the elastic body 1b. Next, an adhesive 5 and a connecting pin are attached to the upper surface (back face) of the natural stone 3 and further, a concrete block 2 to be applied to the surface of the adhesive 5 and the connecting pin, is placed. Finally the upper face of the concrete block 2 is pressed by a pressing device 14 to joint the natural stone 3 to the concrete block 2.