An electronic device enclosure includes a housing defining a latching groove, a cover defining a latching hook to engage in the latching groove, and an opening assembly mounted in the housing. The opening assembly includes a sliding member slidably positioned in the latching groove, and an operation member positioned in the housing and connected to sliding member. The sliding member defines an abutting surface on the sliding member. The operating member is capable of pulling the sliding member to slide along the latching groove, so that the abutting surface of the sliding member pushes against the latching hook and disengages the latching hook from the latching groove.