A variable geometry turbocharger, comprising: a turbine rotor; a turbine housing which accommodates the turbine rotor and which forms at least a part of a scroll flow passage through which exhaust gas to be supplied to the turbine rotor flows; a bearing housing accommodating a bearing which rotatably supports the turbine rotor, the bearing housing being coupled to the turbine housing; and a variable nozzle mechanism for adjusting a flow of exhaust gas to the turbine rotor from the scroll flow passage formed on a radially outer side of the turbine rotor, wherein the variable nozzle mechanism includes: a plurality of nozzle vanes disposed at intervals in a circumferential direction in an exhaust gas flow passage for guiding the exhaust gas from the scroll flow passage to the turbine rotor; a nozzle mount having an annular shape and supporting the nozzle vane rotatably, the nozzle mount forming a flow passage wall on a bearing-housing side of the exhaust gas flow passage; and a nozzle plate having an annular shape and being disposed so as to face the nozzle mount, the nozzle plate forming a flow passage wall on a side opposite to the bearing housing, of the exhaust gas flow passage, wherein the bearing housing includes a bearing-housing side support portion configured to support a radially outer portion of the nozzle mount from a side opposite to the scroll flow passage in an axial direction of the turbine rotor, wherein the turbine housing includes a turbine-housing side support portion configured to support the radially outer portion of the nozzle mount from a side opposite to the bearing-housing side support portion in the axial direction, wherein the nozzle mount is nipped by the turbine-housing side support portion and the bearing-housing side support portion, and wherein the turbine-housing side support portion is disposed so as to protrude toward an inner side of the bearing-housing side support portion in a radial direction of the turbine rotor, along a surface of the nozzle mount, characterized in that the turbine-housing side support portion includes a contact portion to be in contact with the radially outer portion of the nozzle mount, and a non-contact portion formed on an inner side of the contact portion in the radial direction, the non-contact portion facing the nozzle mount via a gap (g). a turbine rotor; a turbine housing which accommodates the turbine rotor and which forms at least a part of a scroll flow passage through which exhaust gas to be supplied to the turbine rotor flows; a bearing housing accommodating a bearing which rotatably supports the turbine rotor, the bearing housing being coupled to the turbine housing; and a variable nozzle mechanism for adjusting a flow of exhaust gas to the turbine rotor from the scroll flow passage formed on a radially outer side of the turbine rotor, wherein the variable nozzle mechanism includes: a plurality of nozzle vanes disposed at intervals in a circumferential direction in an exhaust gas flow passage for guiding the exhaust gas from the scroll flow passage to the turbine rotor; a nozzle mount having an annular shape and supporting the nozzle vane rotatably, the nozzle mount forming a flow passage wall on a bearing-housing side of the exhaust gas flow passage; and a nozzle plate having an annular shape and being disposed so as to face the nozzle mount, the nozzle plate forming a flow passage wall on a side opposite to the bearing housing, of the exhaust gas flow passage, a plurality of nozzle vanes disposed at intervals in a circumferential direction in an exhaust gas flow passage for guiding the exhaust gas from the scroll flow passage to the turbine rotor; a nozzle mount having an annular shape and supporting the nozzle vane rotatably, the nozzle mount forming a flow passage wall on a bearing-housing side of the exhaust gas flow passage; and a nozzle plate having an annular shape and being disposed so as to face the nozzle mount, the nozzle plate forming a flow passage wall on a side opposite to the bearing housing, of the exhaust gas flow passage, wherein the bearing housing includes a bearing-housing side support portion configured to support a radially outer portion of the nozzle mount from a side opposite to the scroll flow passage in an axial direction of the turbine rotor, wherein the turbine housing includes a turbine-housing side support portion configured to support the radially outer portion of the nozzle mount from a side opposite to the bearing-housing side support portion in the axial direction, wherein the nozzle mount is nipped by the turbine-housing side support portion and the bearing-housing side support portion, and wherein the turbine-housing side support portion is disposed so as to protrude toward an inner side of the bearing-housing side support portion in a radial direction of the turbine rotor, along a surface of the nozzle mount, characterized in that the turbine-housing side support portion includes a contact portion to be in contact with the radially outer portion of the nozzle mount, and a non-contact portion formed on an inner side of the contact portion in the radial direction, the non-contact portion facing the nozzle mount via a gap (g).