Disclosed is an electronic device including a housing; a speaker configured to output a sound signal; an enclosure surrounding the speaker and including a pipe passage, through which the sound signal moves in a direction facing an opening formed in the housing; a heat emitting structure mounted on an inner surface or an outer surface of the enclosure; a sealing member attached to the pipe passage; and a processor physically or electrically connected to the heat emitting structure and configured to control emission of heat.