PROBLEM TO BE SOLVED: To obtain a sweet potato seedling-planting machine enabling seedlings to be supplied with ordinary and easy work in standing posture so as to be set in a seedling-feeding mechanism and enabling work to efficiently be conducted by installing seedling-feeding belts in an inclined state to a specific direction. SOLUTION: In this sweet potato seedling-planting machine where endless belts 17a and 17b for feeding seedlings are stretched in a cross direction to the machine and seedlings on the belts 17a and 17b are inserted into the ground by being picked one by one with seedling-inserting openable nails 12 vertically moving, the belts are installed in an inclined state in such a way that their rear parts are lower than their front parts. Consequently, an operator can take out seedlings from a seedling-mounting stand without forcibly reaching forward for seedlings and can quickly supply them on the belts to plant sweet potato seedlings.
