Abstract: This invention provides an electronic assembly and a case thereof. The electronic assembly is used in an electronic device and includes a first cover, a second cover, a plurality of components, a sealing element, and at least one fastening element. The second cover is connected with the first cover to define a containing space. The components are contained in the containing space. The sealing element is sandwiched between the first cover and the second cover and has conductive nonwoven fabric. The fastening element fastens the first cover and the second cover and compresses the conductive nonwoven fabric of the sealing element to allow the first cover to be electrically connected to the second cover. The sealing element with the conductive nonwoven fabric is disposed between the first cover and the second cover of the case in the invention for preventing the components from water and EMI.