Provided is a scrubber apparatus for geothermal power generation configured to treat gas from geothermal power generation equipment to supply a power generation apparatus with the treated gas. The scrubber apparatus for geothermal power generation comprises: a wet-type cyclone scrubber unit that has a reaction tower into which the gas is introduced and a liquid spray unit for spraying liquid into the reaction tower and that is configured to treat the gas with the liquid; a gas derivation unit connected to the wet-type cyclone scrubber unit and configured to derive the gas to the power generation apparatus; and a swirling unit that is arranged farther downstream than the liquid spray unit in a gas flow channel including the wet-type cyclone scrubber unit and the gas derivation unit and that is configured to swirl the gas in a predetermined swirling direction.