In a turbine housing that includes a scroll portion constituting a spiral exhaust gas passage between an exhaust inlet side flange constituting an inlet for exhaust gas and an exhaust outlet side flange constituting an outlet for the exhaust gas, the turbine housing discharging the exhaust gas to an exhaust outlet side through a turbine wheel disposed in a central portion of the scroll portion, a part of a passage face of the exhaust gas passage, in the scroll portion, is formed from a scroll member made of a casting.