An electronic device comprising: a housing including a first plate facing a first direction, a second plate facing a second direction that is opposite to the first direction, and a side member surrounding a space between the first plate and the second plate; a camera deco disposed on at least one of the first plate and the second plate; characterised in, that comprises a flash disposed proximate to the camera deco; a first circuit board disposed to overlap at least a portion of the flash when viewed in the first direction; a second circuit board spaced apart from the first circuit board; a first sealing member disposed between the second plate and the flash; a second sealing member disposed between the flash and at least one of the first circuit board and the second circuit board; a first component and a second component disposed on at least a portion of the first circuit board or at least a portion of the second circuit board; and an interposer electrically connecting the first circuit board and the second circuit board, wherein the interposer assumes a closed-loop shape, wherein a passage for transferring a sound is disposed between a flash hole formed in the second plate and a through hole formed in the flash, wherein an opening facing the through hole is formed in at least one of the first circuit board and the second circuit board, wherein at least one of a microphone and a speaker is disposed in the opening, and wherein the interposer is disposed between the first circuit board and the second circuit board and forms an arrangement space for disposing the first component and the second component between the first circuit board and the second circuit board. a housing including a first plate facing a first direction, a second plate facing a second direction that is opposite to the first direction, and a side member surrounding a space between the first plate and the second plate; a camera deco disposed on at least one of the first plate and the second plate; characterised in, that comprises a flash disposed proximate to the camera deco; a first circuit board disposed to overlap at least a portion of the flash when viewed in the first direction; a second circuit board spaced apart from the first circuit board; a first sealing member disposed between the second plate and the flash; a second sealing member disposed between the flash and at least one of the first circuit board and the second circuit board; a first component and a second component disposed on at least a portion of the first circuit board or at least a portion of the second circuit board; and an interposer electrically connecting the first circuit board and the second circuit board, wherein the interposer assumes a closed-loop shape, wherein a passage for transferring a sound is disposed between a flash hole formed in the second plate and a through hole formed in the flash, wherein an opening facing the through hole is formed in at least one of the first circuit board and the second circuit board, wherein at least one of a microphone and a speaker is disposed in the opening, and wherein the interposer is disposed between the first circuit board and the second circuit board and forms an arrangement space for disposing the first component and the second component between the first circuit board and the second circuit board.