Heat insulator mounting structure

According to the present invention, a heat insulator mounting structure able to reduce noise propagated around a vehicle is provided. The heat insulator mounting structure (1) includes an exhaust pipe (12) disposed so that an upper half surface thereof is positioned higher than a horizontal lower surface (11a) of a vehicle body, a first shield portion (131) for covering an upper surface of the exhaust pipe (12) above the horizontal lower surface (11a) of the vehicle body, and a pair of second shield portions (132) extending downwards below the horizontal lower surface (11a) of the vehicle body from both ends of the first shield portion (131) in the circumferential direction of the exhaust pipe (12).