PROBLEM TO BE SOLVED: To reduce cost for manufacturing a sensing float and improve sensing accuracy, in a riding type rice transplanter including a seven-row planting working machine.SOLUTION: A riding type rice transplanter 1 including a seven-row planting working machine 4 includes a sensing float F in which a first float 11A for leveling two-row planting position on the land and a second float 11B for leveling one-row planting position on the land are connected. A clearance S2 for promoting a flow of muddy water is provided between the first float 11A and the second float 11B. The clearance S2 between the floats 11A and 11B overlaps on a non-land-leveling region S1 of a land-leveling device 40 in a horizontal direction.SELECTED DRAWING: Figure 2