To provide connection structure which is lightweight, and easily executed without stagnation of water flow, dust or the like.

Connection structure between a manhole and a pipe-like body shows that the pipe-like body forming an inflow opening and an outflow opening is connected to a resin-made manhole 1. Penetration holes 11, 12 are drilled in the side wall of the resin-made manhole 1, and a pipe-like body connection part is inserted in the penetration holes 11, 12 so that the edge may reaches its halfway. And a caulking layer 4 is provided so that a level-different parts formed between the edge face of the pipe-like body and the inner faces of the penetration holes 11, 12 may be buried. The exposed surface of the caulking layer 4 is covered with a coat composed of a thermoplastic resin agent. The outer circumferential face of the pipe-like body and the outer wall face of the manhole 1 are welded to each other in the opening position of the outside of the manhole 1 of the penetration holes 11, 12.