A sheet-metal turbine housing in which a scroll part is formed by joining opposing scroll members (5, 7) made of sheet metal to form a spiral-shaped exhaust gas passage therein, the sheet-metal turbine housing comprising: a center core part which includes: a bearing housing portion in which a bearing for rotatably supporting a turbine rotor blade is arrangeable; a passage outlet portion configured to form an outlet side of the gas; and a plurality of support columns (21, 40) connecting the bearing housing portion and the passage outlet portion in an axial direction of the turbine, the support columns (21, 40) being arranged at intervals on an outer circumferential side of the turbine rotor in a circumferential direction of the turbine rotor blade, characterized in that each of the support columns (21, 40) has a cross-sectional shape of substantially quadrilateral formed by an inner arc, an outer arc, an upstream surface, and a downstream surface, wherein an upstream corner in a direction of gas flow has an acute angle, wherein a downstream corner in a direction of gas flow has an acute angle, and wherein each of the upstream surface and the downstream surface of the support column is configured flat and inclines along a gas flow. a center core part which includes: a bearing housing portion in which a bearing for rotatably supporting a turbine rotor blade is arrangeable; a passage outlet portion configured to form an outlet side of the gas; and a plurality of support columns (21, 40) connecting the bearing housing portion and the passage outlet portion in an axial direction of the turbine, the support columns (21, 40) being arranged at intervals on an outer circumferential side of the turbine rotor in a circumferential direction of the turbine rotor blade, characterized in that each of the support columns (21, 40) has a cross-sectional shape of substantially quadrilateral formed by an inner arc, an outer arc, an upstream surface, and a downstream surface, wherein an upstream corner in a direction of gas flow has an acute angle, wherein a downstream corner in a direction of gas flow has an acute angle, and wherein each of the upstream surface and the downstream surface of the support column is configured flat and inclines along a gas flow. a bearing housing portion in which a bearing for rotatably supporting a turbine rotor blade is arrangeable; a passage outlet portion configured to form an outlet side of the gas; and a plurality of support columns (21, 40) connecting the bearing housing portion and the passage outlet portion in an axial direction of the turbine, the support columns (21, 40) being arranged at intervals on an outer circumferential side of the turbine rotor in a circumferential direction of the turbine rotor blade, characterized in that each of the support columns (21, 40) has a cross-sectional shape of substantially quadrilateral formed by an inner arc, an outer arc, an upstream surface, and a downstream surface, wherein an upstream corner in a direction of gas flow has an acute angle, wherein a downstream corner in a direction of gas flow has an acute angle, and wherein each of the upstream surface and the downstream surface of the support column is configured flat and inclines along a gas flow.