The purpose of the present invention is to minimize fluid leakage and pressure leakage, and a turbine apparatus of the present invention comprises: a turbine (510) rotating together with a turbine shaft (513) in response to an inflow of fluid; a turbine cover (520) coupled to an upper end of the turbine (510) to seal the turbine (510); a lower nozzle plate (350) and an upper nozzle plate (370) coupled to each other in the turbine (510); a plurality of nozzles (380) coupled between the lower nozzle plate (350) and the upper nozzle plate (370) to control the amount of fluid flowing into the turbine (510); a through pipe (356) coupled to the center of an upper surface of the lower nozzle plate (350) and passing through the lower nozzle plate (350) and the upper nozzle plate (370); and a control pipe (322) rotating inside the through pipe (356) for opening and closing the nozzles (380).