The living embryo intrauterine transplantation fixing device 10 includes a living embryo intrauterine transplantation tool 1 inserted into the uterus and an embryo storage container magnetic holder (transplantation embryo fixing tool) 6 attached to the living body. The living embryo intrauterine transplanter 1 includes an embryo storage part 42 having an embryo insertion part 44 that communicates with the outside, a magnetic container 43, and a shaft that detachably holds the embryo storage container 4 at the tip part. Shaped container transfer tool 5. The container magnetic holder 6 includes a mounting portion 63 for attaching to the living body epidermis and a magnet 62 capable of attracting the magnetic body 43 of the embryo storage container 4.生体胚子宮内移植固定器具10は、子宮内に挿入される生体胚子宮内移植具1と、生体に取り付けられる胚収納容器磁気的保持具(移植胚固定具)6とを備える。生体胚子宮内移植具1は、外部と連通する胚挿入部44を有する胚収納部42と、磁性体43とを備える胚収納容器4と、胚収納容器4を先端部に離脱可能に保持するシャフト状の容器移送具5とを備える。容器磁気的保持具6は、生体表皮への装着部63と、胚収納容器4の磁性体43を吸引可能な磁石62とを備える。