A mounting apparatus for mounting an expansion card to a rear panel of an electronic device includes a latching member, an operation member, and two connection members. The latching member includes four drive plates, a connection plate, and four latching portions. Each of the drive plates defines a rail therein. The operation member includes four pins, a handle, and a resilient portion. The resilient portion includes a latch block. The two connection members pass through the latching member and the rear panel. Each of the four pins is slidably received in the rail to rotate the latching member, each of the four latching portions is received in a first block plate of the expansion card, the latch block of the operation member is received in a latch of the rear panel, thereby mounting the expansion card to the rear panel.