Turbocharger

A turbocharger comprising:

• a bearing housing that rotationally supports an impeller shaft;
• a turbine housing that is a cast component coupled to an end of the bearing housing in a rotation axis direction of the impeller shaft, wherein exhaust gas discharged from an internal combustion engine flows inside the turbine housing;
• a turbine chamber defined in the turbine housing;
• a turbine impeller that is accommodated in the turbine chamber and is configured to be rotated integrally with the impeller shaft by exhaust gas drawn into the turbine chamber;
• a turbine scroll passage that is defined in the turbine housing and is a part of a passage for conducting exhaust gas that has flowed into the turbine housing to the turbine chamber, the turbine scroll passage surrounding a circumference of the turbine chamber;
• a discharge port defined in the turbine housing, the exhaust gas that has passed through the turbine chamber being conducted to the discharge port;
• and
• a discharge port defining member that is made of a metal sheet and constitutes a wall surface of the discharge port, wherein
• the discharge port defining member includes
• a tubular discharge port main body wall that constitutes the wall surface of the discharge port and has a proximal end, which is closer to the turbine chamber, and a distal end, which is on an opposite side from the proximal end, and
• an outer circumferential edge that extends from the distal end of the main body wall and outward in the radial direction of the impeller shaft, and
• the outer circumferential edge is fixed between the turbine housing and a downstream exhaust pipe, which is connected to the discharge port.