An interspinous process device is disclosed, including an abutting member, two supporting members, and two fixing members, which are separated from each other and capable of being configured to an assembly. The abutting member has two ends and a central region for abutting upon a spinous process of a vertebra. Each of the supporting member is connected with the end of the abutting member and has a terminal end away from the abutting member. The fixing member has a connecting end for connecting with the terminal end of the supporting member and a fixing end for fixing on a vertebral arch of another vertebra. The interspinous process device disclosed herein provides a supporting force between the vertebra and the other vertebra.
