SUPERCHARGER

A supercharger includes a turbine housing (15) and a pipe. An exhaust-gas inlet portion (17) of the turbine housing (15) is connected to an exhaust system member, and includes a scroll port (27) and a bypass port (28). The pipe is configured to cover an inner peripheral surface of the exhaust-gas inlet portion (17) in a state where at least part of the pipe is distanced from the inner peripheral surface, and includes an inserted portion which is positioned in the exhaust-gas inlet portion (17) of the turbine housing (15). An inner passage of the pipe is branched into a first branch passage (34) connected to the scroll port (27) and a second branch passage (35) connected to the bypass port (35). At least part of a pipe wall of the pipe is a part of the second branch passage (35), and is distanced from the inner peripheral surface of the exhaust-gas inlet portion (17).