A mounting apparatus is used to secure a disk drive, which defines a mounting hole therein. The mounting apparatus includes a bracket and a mounting member. The bracket is configured for receiving the disk drive therein. A through hole is defined in the bracket. A locking tab is formed on the bracket. The mounting member includes two arms and an operating portion. One end of each of the arms is pivotably secured on the bracket so that the mounting member is pivotable relative to the bracket, and the other end thereof connects with the operating portion. A positioning portion is formed on the operating member. The operating portion is capable of engaging with the locking tab of the bracket for inserting the positioning portion into the mounting hole of the disk drive via the through hole of the bracket.