An orthodontic implant structure including: an upper structure body having an insertion hole; a pair of bolts each having a head thread portion, a hexagonal locking portion, an engaging ring, and an embedding thread portion; and a base plate in which are formed a first locking hole and a second locking hole that lock with the hexagonal locking portions and having a projecting thread portion. Both bolts are embedded in bone, the first locking hole is locked on the hexagonal locking portion and a first nut is screwed onto the head thread portion, and the insertion hole is fitted over the projecting thread portion and a second nut is screwed onto the projecting thread portion.