Provided is an interspinous fusion implant that is capable of fixing a vertebral body having a lesion by using hooking between spinous processes through a minimal incision without using a pedicle screw. The interspinous fusion implant includes an upper hooking member installed to be hooked with one spinous process and a lower hooking member installed to be engaged with another adjacent spinous process. The upper hooking member and the lower hooking member are coupled to each other and then fixed to each other through a fixing bolt after a distance between vertebral bodies having a lesion is reduced by using a separate mechanism.
