Turbocharger

A turbocharger comprising:

• a turbine housing adapted to be arranged in the middle of an engine exhaust passage;
• a bearing housing coupled to the turbine housing;
• a turbine wheel arranged inside the turbine housing;
• a rotary shaft that is connected to the turbine wheel to be rotational integrally with the turbine wheel and that is rotationally supported by the bearing housing;
• and
• a cooling water passage that is provided inside the turbine housing and that is used to circulate cooling water, wherein
• the cooling water passage is located around the turbine wheel, and
• the turbine housing includes
• a first connection portion joined to the bearing housing,
• a second connection portion joined to a part of the engine exhaust passage located on a downstream side of the turbine housing, and
• a heat insulating portion located between the cooling water passage and at least one of the first connection portion and the second connection portion.