A housing for an electronic apparatus includes a first cover having at least one wedging hook, a second cover having at least one wedging structure that matches at the least one wedging hook, and a third cover having at least one convex block. The convex block of the third cover extends into the wedging structure of the second cover to lock with the wedging hook of the first cover with the wedging structure. The housing can be applied to a cell phone, PDA and other electronic apparatus.