PROBLEM TO BE SOLVED: To provide a seedling transplanter capable of improving workability of replenishing a seedling planting unit with seedlings without decreasing work efficiency of fertilizing.SOLUTION: A seedling transplanter comprises: a boarding step 40 a rear step 47 mounted behind the boarding step 40 a seedling planting unit 60 for planting seedlings mounted on the rear part of a vehicle body 2 granular material feeders 100 mounted at the right and left sides of the rear step 47 for feeding granular materials to a farm field and a fertilizing transmission shaft mounted below the rear step 47 for supplying driving force to the granular material feeders 100. The granular material feeder 100 comprises: a storage member 103 for storing granular materials a guide member for guiding the granular materials ventilation members mounted at right and left sides of a machine body for supplying carrier air, which is for carrying the granular materials, to the guide member and a blower 118 for generating carrier air in the right and left ventilation members and being connected by a relay member 117 mounted behind the fertilizing transmission shaft with the right and left ventilation members.SELECTED DRAWING: Figure 2