A mounting apparatus for mounting expansion cards to expansion slots set on a circuit board includes a bracket and a number of mounting members. The bracket includes two racks opposite to each other and fixed to the circuit board. A number of spaced bars extend from the mounting piece. Each mounting member includes a fixing plate fixed to a corresponding bar, a locking portion extending from a top of the fixing portion. Two parallel raised portions protrude on an inner surface of the fixing plate to sandwich a corresponding end of the corresponding expansion card. The locking portion abuts against the top of the corresponding expansion card.