The present invention provides a supporting member for implanting into a vertebra of a subject, including: a hollow body including an upper surface and a lower surface opposite the upper surface； a first guiding part formed on the upper surface； a second guiding part corresponding to the first guiding part and formed on the lower surface； a first engaging part formed on the upper surface； and a second engaging part corresponding to the first engaging part and formed on the lower surface； wherein the second guiding part extends out an extending part from a side of the hollow body, and the extending part is configured to be slidably coupled to a first guiding part of another supporting member sliding to the lower surface of the supporting member, as a result two supporting members are slidably coupled to each other and engaged to each other. According to the invention, one single supporting member can be implanted into a vertebra of a subject, or two or more supporting members can be in sequence introduced into a vertebra of a subject and combined together therein.
