An electronic device according to various embodiments of the disclosure may include: a first housing, a second housing accommodating at least a portion of the first housing and configured to guide sliding movement of the first housing, and an acoustic assembly including an acoustic component comprising acoustic circuitry disposed inside the first housing, a first pipe extending from the acoustic component toward a first end of the first housing, and a second pipe extending from an edge portion of the second housing to a second end of the second housing toward the first housing. The first end of the first housing or the second end of the second housing for connecting the first pipe and the second pipe when the first housing is accommodated in the second housing may be provided in a shape having a specified slope with respect to the edge portion of the second housing.