Orthodontic autotransplantion can be defined as the placement of a tooth or tooth germ, with or without vitality, in a natural alveolus corresponding to another tooth, or in an artificially created alveolus for this end. Careful patient selection coupled with the selection of appropriate techniques are prerequisite for a good functional treatment and proper esthetic outcome. The purpose of this article was to report a case of a seventeen years old female patient who has undergone tooth autotransplantation, in which the patient was operated by replacing a non-restorable left mandibular first molar on the same side with that of lower third molar germ without its follicle from.