The invention provides a seedling transplant machine, which can enable lubricating oil to spread over the whole guiding shaft and enable the lateral moving of a seedling placing table to be smooth. The seedling transplant machine comprises a seedling placing table which can conduct a reciprocating motion from left to right, a planting device which takes out seedlings from the seedling placing table and plants the seedling in a field, and a guiding shaft (37) provided with a groove part (38) in a helical form. A guiding protrusion (40) contacting with the groove part of the guiding shaft (37) is disposed in the internal part of a sliding body (39). When the guiding shaft (37) is driven and rotates, the sliding body (39) slides, and the seedling placing table moves from left to right. A left coating component (42) and a right coating component (42) which can telescope freely and are used for receiving lubricant oil at the inner side are disposed at the left and right sides of the sliding body (39) and at the periphery of the guiding shaft (37). The internal parts of the left and right coating components (42, 42) are connected by means of a circulation flow path (43).
