Guide apparatus for a turbine of an exhaust gas turbocharger

The present invention relates to a guide apparatus (4) for guiding a gas flow (6) for a turbine (2), preferentially of an exhaust gas turbocharger (1), with a plurality of instationary guide blades (7) arranged distributed in an annular manner, which with respect to their blade angle with regard to the gas flow (6) are adjustably configured between an open position with maximum through-flow cross section (9) for the gas flow (6) and a closed position with minimal through-flow cross section (11) for the gas flow (6), an with a plurality of stationary guide blades (8) arranged distributed in an annular manner, which are configured fixed with respect to their blade angle relative to the gas flow (6). The efficiency of the turbine (2) can be improved if at least one of the stationary guide blades (8) is arranged on a windward side (12) of one of the instationary guide blades (7).