An exhaust gas turbocharger for an internal combustion engine, including in a casing (13) a shaft rotatably supported in said casing an exhaust gas turbine (2) and a compressor (3) at opposite ends of said shaft (4), said exhaust gas turbine (2) being a radial turbine with a radial gas inlet duct (5) and a gas inlet passage (6) for conducting exhaust gas to said turbine wheel (9) and a variable geometry vane structure (7) arranged in said gas inlet passage (6) between two spaced support walls (11, 14) of said casing, one of said support walls (14) projecting into the inflow duct (5), said support wall (14) having a rear side opposite the variable geometry vane structure (7), which is spaced from an inner wall portion (12) of the inflow duct (5), permitting exhaust gas to contact the rear of said projecting support wall (14), said projecting support wall (14) having a thick-walled end section (17) at its radially outer end for pivotally supporting the variable geometry vanes and a thin-walled connecting section (16) by means of which the support wall (14) is connected to the casing (13) of the exhaust gas turbine, the thin-walled connecting section (16) providing for axial resiliency of the projecting support wall (14).