Supply of air to an air-conditioning circuit of an aircraft cabin from its turboprop engine

An aircraft turboprop engine comprising at least one low-pressure body comprising one turbine rotor and one high-pressure body comprising a compressor rotor and a turbine rotor connected to each other by a shaft, the low-pressure body further comprising a shaft connecting the turbine rotor to a gearbox driving a propulsion propeller, said gearbox being a single gearbox, the turboprop engine further comprising means, an air inlet of which is supplied with air by a conduit and an outlet of which is connected to a pipe that supplies air to an air-conditioning circuit of an aircraft cabin, wherein said means comprise at least one air compressor comprising the air inlet and the air outlet, said at least one air compressor being carried by said gearbox, and a rotor of said at least one compressor being mechanically coupled in said gearbox to a shaft of the propulsion propeller driven by the low-pressure body.