Various embodiments relating to a packaging box for packaging an electronic device are presented, and according to one embodiment, the packaging box comprises: a packaging box body; a receiving part included in the packaging box body and receiving the electronic device; and a support structure received in or removed from the receiving part, at least a portion of the supporting structure able to be slantedly folded to or unfolded, wherein the support structure in a folded state is received, together with the electronic device, in the receiving part to support the electronic device to be able to amplify a sound from a speaker included in the electronic device and, in a state removed from the receiving part or in a state received in the receiving part, the supporting structure cradles the electronic device, and additional various other embodiments are possible.