The present invention relates to an onion transplanting device and, more specifically, to an onion transplanting device connected to a body driven at a constant speed while an operator is boarding and capable of conveniently planting onion seedlings at constant intervals by a planting unit rotating with a regular orbit and vertically reciprocating. The onion transplanting device according to the present invention, which is connected to the body and plants onion seedlings on the ground, is characterized by including a first rotary shaft installed on a supporting body connected to the body to be able to rotate, a rotator connected to the first rotary shaft and integrally rotating with the first rotary shaft； a second rotary shaft installed on one side of the rotator to be eccentric to an axial direction of the first rotary shaft and rotating in a direction opposite to the first rotary shaft； a first linkage body connected to the second rotary shaft and rotating at an angular speed identical to the rotator to be rotated in a direction relatively opposite to the rotator； a third rotary shaft installed on one side of the first linkage body to be eccentric to an axial direction of the second rotary shaft and rotating in a direction opposite to the second rotary shaft； a second linkage body connected to the third rotary shaft, rotating at an angular speed identical to the first linkage body to be rotated in a direction relatively opposite to the first linkage body, and maintaining level； and the planting unit installed perpendicularly on the front end of the second linkage body to plant onion seedlings on the ground.본 발명은 양파 정식기에 관한 것으로, 보다 상세하게는 작업자가 탑승한 상태에서 일정 속도로 주행하는 동체에 연결되어 일정한 궤도로 회전 및 상하 왕복운동하는 식재부에 의해 일정한 간격을 유지시키며 양파 모종을 편리하게 식재할 수 있는 양파 정식기에 관한 것이다.본 발명에 따른 양파 정식기는, 동체에 연결되어 양파 모종을 지면에 식재하기 위한 양파 정식기에 있어서, 상기 동체에 연결된 지지체에 회전 가능하게 설치된 제1 회전축과, 상기 제1 회전축과 연결되어 상기 제1 회전축과 일체로 회전되는 회동체와, 상기 제1 회전축의 축 방향과 편심되도록 상기 회동체의 일측에 설치되어 상기 제1 회전축과 반대 방향으로 회전되는 제2 회전축과, 상기
