Disclosed is a medical thread insertion instrument including: a medical thread having an outer surface thereof on which barbs are formed； a needle part having a cavity therein so that the medical thread is able to be inserted, the needle part including a needle having a predetermined length (L1)； and a tube part having a cavity therein so that the needle is able to be inserted, the tube part being inserted into an inner side of the skin and including a tube having a length (L2) shorter than the length (L1) of the needle.
