The utility model aims to provide a seedling transplanter can not set up the ground connection sensor just can restrict rolling mechanism in the decline of the seedling portion of planting work to becoming the decline state, the seedling portion of planting automatically to make rolling mechanism work when. This seedling transplanter is provided with: can set up in the seedling portion of planting of the automobile body that traveles with going up and down, to the seedling portion of planting go up and down lift operational unit (131) of operation, and make the seedling portion of planting around axle rolling rolling mechanism (260) of fore -and -aft direction, in above -mentioned seedling transplanter, constitute and begin to descend and restrict the work of rolling mechanism (260) till the late arrival process schedule time for the operation through lift operational unit (131) makes the seedling plant (120).