An exemplary mounting apparatus for an electronic device includes a base, a cover covering the base, and an ejection mechanism. The base includes a first receptacle portion for receiving the electronic device, and a second receptacle portion for receiving the ejection mechanism. The ejection mechanism includes a retaining member having a resilient tab slantingly extending therefrom, a button member, and a push member. The push member is slidably attached in the second receptacle portion and includes a push block movably abutting the electronic device, and a protrusion detachably engaging with the resilient tab. The button is moved to disengage the push member from the retaining member so that the push member pushes the electronic device out of the base.