Speaker arrangement structure for vehicle

The purpose of the present invention is to provide a speaker arrangement structure for a vehicle, the speaker arrangement structure being capable of transmitting sound (port playback sound) that is played out from a port opening to a cabin, suppressing the falling of mud or water on the port opening, and suppressing the generation of wind noise caused by the flow of air exiting from the port opening. In the speaker arrangement structure, a port opening portion (46) communicating with internal spaces (S2, S3, S4) of the speaker box (40) is provided in a front side surface portion (42i) of the speaker box (40) to form a space portion (70) surrounded by the front side surface portion (42i) of the speaker box (40), the dash panel (37), the hinge column (30), and the partition member (50), and the space portion (70) communicates with a passenger space above or below the space portion (70). The size (L2) of the space (70) in the front-rear direction from the port opening (46) is set to be at least larger than the m