A variable displacement exhaust turbocharger which is equipped with a variable nozzle mechanism and is driven by exhaust gas from an engine, the variable displacement exhaust turbocharger comprising: a nozzle mount which is fixed to a case including a turbine casing of the variable displacement exhaust turbocharger; a plurality of nozzle vanes supported rotatably by the nozzle mount of the variable displacement exhaust turbocharger; a drive ring which is interlocked with an actuator and is externally fitted onto an outer peripheral surface of an annular guide part protruding from a center part of the nozzle mount in an axial direction which is the direction of a rotation axis of the turbocharger, to be rotatably supported; a plurality of lever plates each of which is fitted to a groove formed in the drive ring at one end on an outer peripheral side via a connection pin and is connected to the nozzle vane at the other end on an inner peripheral side; a press-fitting pin (20; 21; 22) which has a flange portion (20a; 21a; 22a) facing one side face of the drive ring, the press-fitting pin (20; 21; 22) being press-fitted into a press-fitting hole formed in one end face of the guide part along the axial direction of the guide part so as to retain the drive ring in the axial direction, to be rotatably supported, characterized in that the variable displacement exhaust turbocharger further comprises: an adjusting member arranged between the flange portion (20a; 21a; 22a) of the press-fitting pin (20; 21; 22) and the one end face of the guide part, wherein the guide part supports an inner peripheral surface of the drive ring and has a width in the axial direction which is smaller than a width of the drive ring in the axial direction; wherein the adjusting member (20c; 21f; 23) is configured to adjust an axial distance between the flange portion (20a; 21a; 22a) of the press-fitting pin (20; 21; 22) and one side face of the nozzle mount, the drive ring being sandwiched between the flange portion (20a; 21a; 22a) and the side face of the nozzle mount, further, the thickness of the adjusting member (20c; 21f; 23) in the axial direction is set so that an appropriate axial clearance is secured between the flange portion (20a; 21a; 22a) of the press-fitting pin (20; 21; 22) and the drive ring, when the press-fitting pin (20; 21; 22) is press-fitted into the press-fitting hole and the adjusting member is abatted to the one end face of the guide part. a nozzle mount which is fixed to a case including a turbine casing of the variable displacement exhaust turbocharger; a plurality of nozzle vanes supported rotatably by the nozzle mount of the variable displacement exhaust turbocharger; a drive ring which is interlocked with an actuator and is externally fitted onto an outer peripheral surface of an annular guide part protruding from a center part of the nozzle mount in an axial direction which is the direction of a rotation axis of the turbocharger, to be rotatably supported; a plurality of lever plates each of which is fitted to a groove formed in the drive ring at one end on an outer peripheral side via a connection pin and is connected to the nozzle vane at the other end on an inner peripheral side; a press-fitting pin (20; 21; 22) which has a flange portion (20a; 21a; 22a) facing one side face of the drive ring, the press-fitting pin (20; 21; 22) being press-fitted into a press-fitting hole formed in one end face of the guide part along the axial direction of the guide part so as to retain the drive ring in the axial direction, to be rotatably supported, an adjusting member arranged between the flange portion (20a; 21a; 22a) of the press-fitting pin (20; 21; 22) and the one end face of the guide part,