A vertical rehabilitation appliance includes a horizontal frame, vertical frame, moving mechanism, head positioning structure, body positioning structure, and fastening belts. The vertical frame has two first posts coupled to the horizontal frame and formed with holes. The first posts are coupled to a second post. The second post and the horizontal frame are coupled to two third posts. Moving mechanisms are horizontally provided between the first posts and bilaterally provided with positioning devices for engagement with the holes of the first posts. The head positioning structure and the body positioning structure are provided on the moving mechanisms. The fastening belts are provided between the third posts to fix a rehabilitation patient's shoulders and lower limbs in position. Two back-positioned ends of the fastening belts have first connecting elements coupled to a second connecting element so as to pull the rehabilitation patient's back during spine rehabilitation therapy.