A mounting apparatus for I/O ports (14) of a computer includes an I/O port holder (10) for holding the I/O ports and a bracket (20) for holding and securing the I/O port holder. The bracket includes a front panel (21) and side panels (23, 25) extending from the front panel, a housing space configured by the front panel and the side panels being isometric to the I/O port holder for encasing the I/O port holder therein, at least an arc-shaped jut (2312) is formed on an interior surface of the enclosure panel. At least an arc-shaped recess (1231) engaging with the arc-shaped jut of the bracket is formed on an exterior surface of the I/O port holder for securing the I/O port holder.