Electronic device packaging box

A packaging box of an electronic device, comprising:

• a packaging box body including an inner wall;
• a receiving part included in the packaging box body and receiving the electronic device;
• and
• a supporting 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 supporting 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,
• wherein the supporting structure cradles the electronic device in both a state removed from the receiving part and a state received in the receiving part,
• wherein the supporting structure includes:
• a coupling hole formed in a first portion of the supporting structure, and
• a coupling part formed in a second portion of the supporting structure and coupled to or removed from the coupling hole,
• wherein in a state in which the electronic device is received in the receiving part, the speaker included in the electronic device is disposed adjacent to the inner wall of the packaging box body, the speaker and a peripheral part of the speaker are sealed by the inner wall, and
• wherein the sound from the speaker included in the electronic device is amplified by reflection on the inner wall of the packaging box body and the supporting structure.