A mounting apparatus for a PCI card includes an enclosure, a mounting bracket, a securing bracket, and a securing member and a resilient member. The mounting bracket is configured to secure a first end of the PCI card. The securing bracket includes a bracket body and a securing plate. The securing member includes a main body and a securing portion. The main body defines a mounting slot. The securing member is configured to rotate to enable the securing portion to engage the securing plate, and to enable the mounting slot to receive a second end of the PCI card. The resilient member is mounted to the securing bracket and deformed to resist the securing member. The resilient member releases to drive the securing member to move away from the PCI card when the securing portion disengages from the securing plate.