A electronic device includes a housing, a cover detachably mounted on the housing and a releasing assembly. The housing has a first surface and two latching hooks disposed on the first surface. The releasing assembly is mounted on the cover to assemble the cover to the housing and detach the cover from the housing. The releasing assembly includes a fixing base mounted on the cover, two latching pieces, an elastic piece and a releasing piece. The two latching pieces are slidably mounted on the fixing base and both includes a latching end exposing out of the fixing base. The elastic piece is elastically assembled to the fixing base to connect the two latching pieces together. The releasing piece is releasably assembled to the fixing base for releasably resisting on the two latching pieces to make the latching pieces release from the corresponding latching hooks.