A turbine housing comprising an inner pipe and an outer pipe, the inner pipe being configured to form an exhaust air flow path between an exhaust-air-inlet-side flange forming an inlet of exhaust gas and an exhaust-air-outlet-side flange forming an outlet of the exhaust gas, the outer pipe being configured to cover the inner pipe such that a predetermined spacing is formed between the inner pipe and the outer pipe, wherein the inner pipe has: an inner pipe main body configured to form the exhaust air flow path having a spiral shape, the inner pipe main body being connected to the exhaust-air-inlet-side flange such that the exhaust gas is allowed to enter between the inner pipe and the outer pipe; and an exhaust tube attached to the exhaust air outlet side of the inner pipe main body in a freely slidable manner with an intervening sealing member (25,26,27), wherein the exhaust tube is made of sheet metal, characterized in that the inner pipe main body has a cast portion and an accommodating portion (24c-e) configured to accommodate the sealing member is formed in the cast portion, and the accommodating portion is a recessed groove portion having an annular shape formed in an outer circumferential surface of the inner pipe main body on the exhaust air outlet side, the sealing member is a sealing member having a C-shape when viewed in a front view, the sealing member being fitted into the recessed groove portion having the annular shape, and one end portion side of the exhaust tube is attached to the outer circumferential surface in a freely slidable manner with the intervening sealing member having the C-shape, or in that the accommodating portion is a cutout portion having an annular shape formed in an outer circumferential surface of an exhaust-air-outlet-side end portion of the inner pipe main body, the sealing member is a sealing member having an O-shape when viewed in a front view and an Ω-shape when viewed in a sectional view, the sealing member being fitted into the cutout portion having the annular shape, and an inner circumferential surface side of one end portion of the exhaust tube is supported on the outer circumferential surface by a peak portion of the sealing member having the Ω-shape in a freely slidable manner, or in that the accommodating portion is a recessed groove portion having an annular shape formed on an end surface of an exhaust-air-outlet-side end portion of the inner pipe main body, the sealing member is a sealing member having an O-shape when viewed in a front view and a C-shape when viewed in a sectional view, the sealing member being fitted into the recessed groove portion having the annular shape, and a protruded portion having an annular shape is formed on the end surface of one end portion Z of the exhaust tube, the protruded portion having the annular shape being attached to the recessed groove portion having the annular shape in a freely slidable manner with the intervening sealing member. an inner pipe main body configured to form the exhaust air flow path having a spiral shape, the inner pipe main body being connected to the exhaust-air-inlet-side flange such that the exhaust gas is allowed to enter between the inner pipe and the outer pipe; and an exhaust tube attached to the exhaust air outlet side of the inner pipe main body in a freely slidable manner with an intervening sealing member (25,26,27), wherein the exhaust tube is made of sheet metal, characterized in that the inner pipe main body has a cast portion and an accommodating portion (24c-e) configured to accommodate the sealing member is formed in the cast portion, and the accommodating portion is a recessed groove portion having an annular shape formed in an outer circumferential surface of the inner pipe main body on the exhaust air outlet side, the sealing member is a sealing member having a C-shape when viewed in a front view, the sealing member being fitted into the recessed groove portion having the annular shape, and one end portion side of the exhaust tube is attached to the outer circumferential surface in a freely slidable manner with the intervening sealing member having the C-shape, or in that the accommodating portion is a cutout portion having an annular shape formed in an outer circumferential surface of an exhaust-air-outlet-side end portion of the inner pipe main body, the sealing member is a sealing member having an O-shape when viewed in a front view and an Ω-shape when viewed in a sectional view, the sealing member being fitted into the cutout portion having the annular shape, and an inner circumferential surface side of one end portion of the exhaust tube is supported on the outer circumferential surface by a peak portion of the sealing member having the Ω-shape in a freely slidable manner, or in that the accommodating portion is a recessed groove portion having an annular shape formed on an end surface of an exhaust-air-outlet-side end portion of the inner pipe main body, the sealing member is a sealing member having an O-shape when viewed in a front view and a C-shape when viewed in a sectional view, the sealing member being fitted into the recessed groove portion having the annular shape, and a protruded portion having an annular shape is formed on the end surface of one end portion Z of the exhaust tube, the protruded portion having the annular shape being attached to the recessed groove portion having the annular shape in a freely slidable manner with the intervening sealing member.