PURPOSE: A seedling frame rotation device is provided to attach seedlings to the surface of up, down, left, right more and evenly by easily rotating a seedling frame in a water tub. CONSTITUTION: A seedling frame rotation device includes a holder(20) installed in water and a seedling frame fixing part(40) installed to rotate in the holder and fixated to a seedling frame in which seedlings are attached. The seedling frame fixing part comprises a side supporting the arranged member in both sides respectively a seedling frame fixed portion fixed to the seedling frame and a rotation shaft connected with the two side supporting members whereby both ends are installed to be rotatable in the holder.본 발명에 따른 종묘틀 수동회전 거치장치는, 수중에 설치되는 거치대 및 상기 거치대에 수동회전되도록 거치되며, 종묘가 부착된 종사가 고정되는 종묘틀을 포함한다.이와 같이 본 발명은, 수중에 설치되는 거치대와, 거치대에서 수동회전되는 종묘틀을 포함함으로써, 종묘가 부착된 종사의 전체적인 부위에 태양광 에너지가 골고루 도달되어 종묘를 효율적으로 배양할 수 있다.