An electronic device enclosure comprises a securing plate and a bracket adapted to receive an I/O connector therein. The bracket comprises a first resilient piece, a second resilient piece, a first retaining piece and a second retaining piece. The bracket is capable of securing to the front wall in a first position, where the first resilient piece and the first retaining piece abut two opposite surfaces of the securing plate, and a second position, where the second resilient piece and the second retaining piece abut the two opposite surfaces of the securing plate.