In various embodiments, an electronic device includes: a diaphragm, a speaker module including a speaker configured to output a sound through a vibration of the diaphragm, and a housing accommodating the diaphragm and the speaker module therein and including a first space provided in a first direction from the speaker module and a second space provided in a second direction opposite the first direction. The electronic device further includes an air adsorption member comprising an air adsorbing material disposed in the first space and having a volume ratio of 90% or less of the first space, the air adsorption member configured to reduce air resistance to the diaphragm disposed above the speaker module without limiting the vibration of the diaphragm.