An electronic device comprises a housing, an electronic component fixed to the housing, and a fixing mechanism. The electronic component defines first and second latching notches. The fixing mechanism comprises a first latching component, a second latching component opposite to the first latching component, a first positioning post, and a second positioning post opposite to the first positioning post. The first and second latching components are capable of hooking over opposite ends of the electronic component, and fixing the electronic component to the housing in a first direction. The first and second positioning posts are capable of latching to the first and second latching notches, for fixing the electronic component to the housing in a second direction perpendicular to the first direction.