An electronic device includes a front cover, a rear cover engaging with the front cover, and a connecting mechanism fixed to the front cover. The front cover is secured to the rear cover to cooperatively define a receiving space for receiving a part of the connecting mechanism. The front cover includes a first panel defining two limiting members and a first sidewall extending from a rim of the first panel and defining two latching members. The rear cover includes a second panel defining two protrusions and a second sidewall extending from a rim of the second panel and defining two hook members. The protrusions correspond to the limiting members and are fixed thereto, and the hook members correspond to the latching members and engage therewith.