Interspinous implant comprising: (i) an implant body which has an upper face a lower face and four sides wherein the implant body comprises a first recess in one side of the implant body and a second recess in the opposing side of the implant body to the first recess wherein each recess is suitable for receiving a spinous process of a vertebrae and attachment means which is suitable for attaching a band to the implant body characterised in that the implant also comprises (ii) a lock which is hinged to a side of the implant body that does not have the first or second recess wherein the lock can rotate about the hinge between a closed position in which the lock lies substantially within a cavity in the side of the implant body or against the side of the implant body and an open position in which the lock projects away from the side of the implant body wherein the lock has an aperture so that a band can be passed through the aperture in the lock when the lock is in the open position and the band can be secured against movement relative to the lock and the implant body by the lock when the lock is in the closed position.
