An electronic device according to various embodiments may include: a housing, an acoustic hole formed in a first direction of the housing, an instrument installed in the housing in a second direction perpendicular to the first direction, a mic, and a mic holder including a body installed in the housing, a seat formed in the body part to receive the mic, a first opening formed in one surface of the body and connected to the seat, a second opening formed in another surface of the body, and a third opening formed in the body and connected to the acoustic hole. As the second opening of the mic holder is closed by an instrument of the electronic device closely attached to the other surface of the body part, an acoustic channel in which a sound introduced into the third opening is delivered to a mic hole of the mic may be formed.