The present invention when transplanting seedlings of various crops, such as peppers, beans, sesame seeds, cabbages, etc., including seeding and growing in a pot or wheat grown in a field, when transplanting to the field, A one-handed seedling transplanter with cover function that not only enables one-touch method in which transplantation or sowing work is completed by simply holding the transplantation device with one hand and then removing it from the ground, but also compulsory cover work. In that, First, the one-handed seedling transplanter (S) with the cover function of the present invention is connected to the handle of the upper end and directly transfers the force to the inside of the pipe-type inner support pipe (10), and one end of the inner support pipe ( 10 is coupled to the other end is coupled to the implant insertion device 50, the central axis is connected to the outer support pipe 30 so that the inner support pipe 10 is a means for pulling the implant insertion device (50) ( 20) and the outer support pipe is connected to the guide device 33 for guiding or assisting the vertical movement of the inner support pipe 10 and the implant insertion device 50 directly and coupled to the depth adjusting device 100 at the bottom. And a loader 52 comprising a transplantation insert 53 + 55 consisting of a transplant insertion body 53 and at least one transplantation cover 55 and connected to the implantation body 53 is the linkage 20. And graft insertion device 50, which is combined with one end of the inner support tube 10 and performs a seedling transplant operation by operating the inner support tube 10, and a support spring length. Supporting jaw composed of the sum of the teeth 80 and the engaging plate device 90, one side is coupled to the outer support tube 30 and the other side is coupled to the inner support tube 10 or linkage device 20 A locking device 8090 and a cover insertion device 60 fixedly or detachably connected to the outer support pipe 30 an
