The invention provides an electronic device including a user operable device and a foldable cover flexibly connected to the user operable device and capable to cover a whole top of the user operable device. The foldable cover includes a plurality of sections and a plurality of foldable lines, so that the foldable cover can be folded along the plurality of foldable lines formed between different sections. The sections are connected through the flexible foldable lines to allow the adjacent sections foldable with respective to one another to make the foldable cover in a supporting state, so that a first fastening section and a second fastening section are releasably fastened together so as to fasten a first supporting section and a second supporting section, and a first attachment section and a second attachment section are placed flatly on a plane.