An electronic device includes a first housing, a second housing, a component member, a screw, and a gathering post. The first housing defines a through hole. The second housing combines with the first housing to form a receiving space. The component member is received in the receiving space. The screw passes through the through hole of the first housing to screw in a predetermined position of the component member. The gathering post gathers filings falling from the component member when the screw is screwed in the component member.