AGENT DEVICE, AGENT CONTROL METHOD, AND PROGRAM

An agent device includes a microphone configured to collect a speech sound inside a vehicle cabin, a speaker configured to output a speech sound inside the vehicle cabin, and a plurality of agent function elements having different functions. Each of the plurality of agent function elements generates a speech sound of an agent that speaks to an occupant of a vehicle on the basis of a meaning of the speech sound collected by the microphone, causes the speaker to output the generated speech sound of the agent. The agent function element serving as a main agent that has a dialogue with the occupant is switched on the basis of content of the speech sound collected by the microphone.