An electronic device comprises: a housing comprising a front plate, a rear plate facing in the opposite direction to the front plate, and a side member surrounding a space between the front plate and the rear plate; a display which is viewed from the outside through the front plate; a first opening formed between an edge of the front plate and the side member; a mid-plate which is arranged between the display and the rear plate and extends from the side member, overlaps the display when viewed from above the display, and includes a second opening adjacent to the first opening; a speaker which is located in a space adjacent to the second opening, between the mid-plate and the rear plate, and includes a diaphragm facing the display; a sound guide structure arranged between the mid-plate and the display, the sound guide structure comprising a grill portion, which is inserted into the first opening and includes a plurality of through holes, and a flange portion which extends from the grill portion to a space between the display and the mid-plate and forms a sound passage between the second opening and the grill portion together with the mid-plate; and a scaling member at least partially surrounding the periphery of the sound guide structure.