Abstract: A composite earphone includes at least one earphone assembly and a transmission-line assembly. The at least one earphone assembly includes a speaker module, a wireless signal transmission module, an adapting device, and a battery module, wherein both the speaker module and the wireless signal transmission module are electrically connected with the battery module. The transmission-line assembly includes at least one signal-output portion, a wire portion, and a signal-input portion. The at least one signal-output portion corresponds to the adapting device of the at least one earphone assembly, and that the wire portion is connected with the at least one signal-output portion and the signal-input portion. Thereby, an earphone user can listen to the music by a way of wireless transmission of audio signals through the wireless signal transmission module or a way of wire transmission audio of audio signals through the transmission-line assembly.