An exemplary ejection apparatus is provided for ejecting a data storage device out of a chassis. The ejection apparatus includes a pair of driving members, a connecting member, and an operating member. The operating member is slidably attached to the chassis and the connecting member. The connecting member includes a pair of second steps. The driving members are pivotably crossed together and attached to the chassis. Each of the driving members includes a driving portion with a slanting wall formed at one free end thereof, and a first step formed at the other end thereof slidably engaging with the corresponding second step. The operating member moves the connecting member to urge a scissoring movement of the driving member, with the first steps slidably engaging with the second steps. The driving portions push the data storage device out of the chassis.