A quickly detached cooling fan mounting bracket for a computer, by which a cooling fan can be quickly removed away from a computer chassis without detaching any other peripheral devices, whereby a large enough computer inner space is exposed in order to facilitate rapid replacement of electrical components. The cooling fan mounting bracket includes a cooling fan receptive mount; a cooling fan; a connecting member, which allows the cooling fan receptive mount to be movably installed on the computer chassis; and a orienting member, which secures the cooling fan receptive mount and the cooling fan onto the computer chassis, and prevents the cooling fan from vibration during the normal operation. Compared with the conventional art, the present invention is easier to remove the cooling fan away from the chassis, thereby, facilitates rapid replacement or maintenance of the computer components.
