An object of the present invention is to provide an apparatus for automatically sowing seaweed seeds capable of automatically binding seedling lines to aquaculture ropes after grasping and stopping aquaculture ropes. According to the present invention, a seedling line inserter for inserting seedling lines into aquaculture ropes can be accurately and stably controlled, and the replacement of the seedling inserter can be made easily.본 발명의 목적은, 양식 로프를 잡아 정지시킨 후 양식 로프에 종묘사를 자동으로 결속시킬 수 있는, 해초류 종묘 자동 꽂이 장치를 제공하는 것이다.