A mounting mechanism is disclosed. The mounting mechanism includes a chassis with an anchor member, a slide rail defining a mounting slot to receive the anchor member, and a retaining member slidably attached to the slide rail. A first end of the retaining member is pivotable attached to the slide rail. The retaining member comprises a stop surface and an inclined surface opposite to the stop surface formed from a second end of the retaining member. The anchor member slides in the mounting slot to drive the inclined surface of the retaining member to rotate the retaining member, when the anchor member rides over the stop portion, the retaining member is restored to make the stop surface of the stop portion retain the anchor member in the mounting slot of the slide rail.