To provide a bending block capable of bending arranged-connection-type boundary blocks with one block, improving stability in installation and workability of installation work, and enhancing the beautiful appearance of a bent part.

This bending block 100 has a first block 110 including a first connection end 111 for connecting the connection type boundary block adjacent to either of the blocks and a second block 120 including a second connection end 121 for connecting the connection type boundary block adjacent to the other block by forming angles for each other.