To prevent the scattering of drainage and contrive the fouling prevention of the ground surface of the circumference of a down pipe by installing a connection cylinder body having a down pipe connection part on one end and a rainwater receiving connection part on the other end, and a gap part comprising a rainwater receiving body and between both.

A gap part 4 is provided between a connection cylinder body 2 and a rainwater receiving body 3, a down pipe 1 and the rainwater receiving body 3 are connected by the connection cylinder body 2, and rainwater vigorously flowing from the down pipe 1 is received by the rainwater receiving body 3. Thus, the energy of the rainwater is reduced to prevent scattering to the outside of the rainwater, which can be gradually drained from the gap part 4. A plurality of rainwater discharge holes are provided on a bottom part and a wall part receiving the rainwater on the rainwater receiving body 3, the down pipe 1 and the rainwater receiving body 3 are connected by the connection cylinder body 2, and the vigorously flowing rainwater is received. Thereby even when a rainwater amount is large, the upward rainwater drain hole is largely provided and the rainwater stored in the rainwater receiving body 3 can be drained.