A foldable electronic device (100) includes a cover (10) having a side barrel (132) and a main body (20) rotatably connected to the cover. The main body includes a body shell (21) accommodating a plurality of electronic components therein, a central barrel (244) formed at one end of the body shell, and an antenna seat (23) attached to an opposite end of the body shell. The side barrel of the cover is located adjacent to the central barrel of the main body.