Remote assistance device intended to be embedded in an aircraft comprising means for establishing at least one first communication (112, 121, 122) with an air traffic control centre, the cockpit of the aircraft being equipped with at least one loudspeaker and one microphone intended for the pilot of the aircraft, said device comprises: - communication means for establishing a second communication, with a remote assistance centre; - command relaying means for performing a relaying of commands received via the second communication to devices of the aircraft, - a plurality of input-output interfaces including a first input-output interface configured to receive audio signals originating from the first communication or communications, a second input-output interface configured to receive audio signals from the microphone and a third input-output interface configured to receive audio signals originating from the second communication; characterized in that it comprises: - first mixing means for performing a first mixing of audio signals originating from the first communication or communications (112, 121, 122) and of audio signals originating from the second communication, the result of the first mixing of audio signals being transmitted by the second input-output interface to the at least one loudspeaker; - second mixing means for performing a second mixing of audio signals originating from the first communication or communications (112, 121, 122) and of audio signals originating from the microphone, the result of the second mixing of audio signals being transmitted by the third input-output interface to the second communication; - an interface for receiving a remote assistance activation signal, and: ∘ in the presence of the remote assistance activation signal, activation means for activating at least the first and second mixings and the relaying of commands; and ∘ in the absence of the remote assistance activation signal, propagation means for transmitting the audio signals originating from the first communication or communications (112, 121, 122) to the at least one loudspeaker and for transmitting the audio signals originating from the microphone to the first communication or communications (112, 121, 122). - communication means for establishing a second communication, with a remote assistance centre; - command relaying means for performing a relaying of commands received via the second communication to devices of the aircraft, - a plurality of input-output interfaces including a first input-output interface configured to receive audio signals originating from the first communication or communications, a second input-output interface configured to receive audio signals from the microphone and a third input-output interface configured to receive audio signals originating from the second communication; - first mixing means for performing a first mixing of audio signals originating from the first communication or communications (112, 121, 122) and of audio signals originating from the second communication, the result of the first mixing of audio signals being transmitted by the second input-output interface to the at least one loudspeaker; - second mixing means for performing a second mixing of audio signals originating from the first communication or communications (112, 121, 122) and of audio signals originating from the microphone, the result of the second mixing of audio signals being transmitted by the third input-output interface to the second communication; - an interface for receiving a remote assistance activation signal, and: ∘ in the presence of the remote assistance activation signal, activation means for activating at least the first and second mixings and the relaying of commands; and ∘ in the absence of the remote assistance activation signal, propagation means for transmitting the audio signals originating from the first communication or communications (112, 121, 122) to the at least one loudspeaker and for transmitting the audio signals originating from the microphone to the first communication or communications (112, 121, 122). ∘ in the presence of the remote assistance activation signal, activation means for activating at least the first and second mixings and the relaying of commands; and ∘ in the absence of the remote assistance activation signal, propagation means for transmitting the audio signals originating from the first communication or communications (112, 121, 122) to the at least one loudspeaker and for transmitting the audio signals originating from the microphone to the first communication or communications (112, 121, 122).