A turbine comprising: a turbine impeller; a turbine housing disposed so as to cover the turbine impeller and including an outlet portion for discharging an exhaust gas having passed through the turbine impeller; and a bearing housing disposed on an opposite side of the outlet portion of the turbine housing in the axial direction; and a heat shield portion positioned on an opposite side of the outlet portion in an axial direction across at least one of the turbine impeller or a scroll flow passage communicating with the turbine impeller, wherein the heat shield portion includes: a first heat-shielding plate portion which is disposed while facing the scroll flow passage to face a section of the turbine housing and forms a hub-side wall surface of a throat portion of the scroll flow passage in the axial direction, the section forming a shroud-side wall surface of the throat portion; and a second heat-shielding plate portion arranged to at least partially have a gap with the first heat-shielding plate portion, and wherein the first heat-shielding plate portion and the second heat-shielding plate portion are configured such that a first end part of the first heat-shielding plate portion and a second end part of the second heat-shielding plate portion are fixed to be interposed between the turbine housing and the bearing housing, a first surface of the first end part has a first recess and a second surface of the second end part has a second recess, and the first surface and the second surface facing each other, characterized in that the first recess extends in one of a circumferential direction or a radial direction in the first surface of the first heat-shielding plate portion and the second recess extends in the other of the circumferential direction or the radial direction in the second surface of the second heat-shielding plate portion. a turbine impeller; a turbine housing disposed so as to cover the turbine impeller and including an outlet portion for discharging an exhaust gas having passed through the turbine impeller; and a bearing housing disposed on an opposite side of the outlet portion of the turbine housing in the axial direction; and a heat shield portion positioned on an opposite side of the outlet portion in an axial direction across at least one of the turbine impeller or a scroll flow passage communicating with the turbine impeller, wherein the heat shield portion includes: a first heat-shielding plate portion which is disposed while facing the scroll flow passage to face a section of the turbine housing and forms a hub-side wall surface of a throat portion of the scroll flow passage in the axial direction, the section forming a shroud-side wall surface of the throat portion; and a second heat-shielding plate portion arranged to at least partially have a gap with the first heat-shielding plate portion, and wherein the first heat-shielding plate portion and the second heat-shielding plate portion are configured such that a first end part of the first heat-shielding plate portion and a second end part of the second heat-shielding plate portion are fixed to be interposed between the turbine housing and the bearing housing, a first surface of the first end part has a first recess and a second surface of the second end part has a second recess, and the first surface and the second surface facing each other, characterized in that the first recess extends in one of a circumferential direction or a radial direction in the first surface of the first heat-shielding plate portion and the second recess extends in the other of the circumferential direction or the radial direction in the second surface of the second heat-shielding plate portion. a first heat-shielding plate portion which is disposed while facing the scroll flow passage to face a section of the turbine housing and forms a hub-side wall surface of a throat portion of the scroll flow passage in the axial direction, the section forming a shroud-side wall surface of the throat portion; and a second heat-shielding plate portion arranged to at least partially have a gap with the first heat-shielding plate portion, and wherein the first heat-shielding plate portion and the second heat-shielding plate portion are configured such that a first end part of the first heat-shielding plate portion and a second end part of the second heat-shielding plate portion are fixed to be interposed between the turbine housing and the bearing housing, a first surface of the first end part has a first recess and a second surface of the second end part has a second recess, and the first surface and the second surface facing each other, characterized in that the first recess extends in one of a circumferential direction or a radial direction in the first surface of the first heat-shielding plate portion and the second recess extends in the other of the circumferential direction or the radial direction in the second surface of the second heat-shielding plate portion.