A pushing assembly is provided for pushing a data storage device out of a computer enclosure. The pushing assembly includes a pair of receiving portions, a restricting portion, a pushing device, and a stopping member. The receiving portions and the restricting portion are arranged in the computer enclosure. The pushing device is assembled on the data storage device. The pushing device comprises a pair of pushing portions. The pushing portions press against the receiving portions respectively to push the pushing device moving. The pushing device drives the data storage device to slide a certain distance to facilitate the data storage device being taken out from the computer enclosure. The stopping member is arranged in the restricting portion to keep the pushing device at a locked state.