The cleaning device for the seedling box according to the present invention is a cleaning device for a seedling box, the motor is installed in the frame having two side plates spaced apart from each other side by side, the inlet support for supporting the seedling box is introduced Two side plates are installed at the entrance between the two side plates, and a pair of feeding rollers for transporting the seedling boxes are installed up and down side by side at the entrance side between the two side plates, and the outlet support supporting the outflowing seedling boxes is the two side plates. A pair of discharge rollers, which are installed at the outlets between them, and which feed the seedling boxes, are installed up and down side by side at the outlet side between the two side plates, and brush the upper and lower sides and the edges of the seedling boxes passing between the feed rollers and the discharge rollers. A plurality of rotating brush member is installed in the center between the two side plates, That the closing roller, the discharge roller and the rotary brush member is power rotated by a motor, includes spaced apart on top of the plurality of the rotary brush member is a plurality of nozzles for injecting wash water, which is installed on the upper side of two side plates a central portion. Therefore, the present invention washes the seedling box because the inner surface and the edge of the seedling box moving between the rotation of the feed roller and the discharge ejector rotated by the power of the motor to be brushed by the water sprayed by the nozzle while brushed by the rotating brush member is a power rotation. Conveniently, the cleaning operation can be easily realized.본 고안에 의한 육묘상자의 세척장치는 육묘상자를 세척하는 것으로 이루어지는 육묘상자의 세척장치에 있어서, 나란하게 상호 이격된 두 개의 측면판을 구비하는 프레임 내에 모터가 설치되고, 투입되는 육묘상자를 지지하는 입구지지체가 두 개의 측면판 사이의 입구에 설치됨과 아울러 육묘상자를 이송하는 한 쌍의 투입롤러가 두 개의 측면판 사이의 입구측에 상하로 나란하게 설치되고, 유출되는 육묘상자를 지지하는 출구지지체가 두 개의 측면판 사이의 출구에 설치됨과 아울러 육묘상자를 이송하는 한 쌍의 배출롤
