A vertebral rod piece connecting device includes a first connecting rod having one end with a first protruding part, of which the outer side is substantially spheral arc shaped a second connecting rod having one end with a second protruding part a first connecting kit having a first through hole and a first connecting mechanism a second connecting kit having a second through hole and a second connecting mechanism and an elastic body arranged between the first connecting rod and the second connecting rod. The first through hole is used for enabling one end of the first connecting rod to penetrate the first connecting kit and the inner side on the top end of the first connecting kit is at least substantially spheral arc shaped partially for forming a universal connection with the outer side of the first protruding part of the first connecting rod. The second through hole is used for enabling one end of the second connecting rod to penetrate the second connecting kit. The second connecting mechanism is used for forming a self-connection with the first connecting mechanism of the first connecting kit. The disclosed is characterized in that a second elastic body is further equipped in the vertebral rod piece connecting device the second elastic body is arranged between the second protruding part of the second connecting rod and the second connecting kit and the second elastic body has a third through hole for enabling one end of the second connecting rod to penetrate the second elastic body.一種脊椎桿件連結裝置,其包括:第一連結桿,其一端有一第一凸出部,該第一凸出部的外側實質上成球弧狀;第二連結桿,其一端有一第二凸出部;第一連結套件,該第一連結套件具有:第一穿孔,藉以使該第一連結桿之一端可穿出該第一連結套件,且該第一連結套件之頂端內側至少部份實質上成球弧狀,用以和該第一連結桿之該第一凸出部外側形成萬向結合;及第一連結機構;第二連結套件,該第二連結套件具有:第二穿孔,藉以使該第二連結桿之一端可穿出該第二連結套件;及第二連結機構,用以與該第一連結套件之該第一連結機構形成自體連結;及第一彈性體,該第一彈性體放置於該第一連結桿及該第二連結桿之間;其特徵在,該脊椎桿件連結裝置進一步包含一第二彈性體,該第二彈性體放置於該第二連結桿之該第二凸出部與該第二連結套件之間,且該第二彈性體具有一第三穿孔,藉以使該第二連結桿之一端可穿出該第二彈性體。100‧‧‧連結套件110‧‧‧第一連結套件120‧‧‧第二連結套件200‧‧‧彈性體211‧‧‧第一波浪狀彈簧221‧‧‧第二波浪狀彈簧310‧‧‧第一連結桿320‧‧‧第二連結桿
