A spool assembly for a dual bearing reel includes a tubular bobbin, first
and second flange portions, first and second annular portions, and first
and second fishing line entry prevention portions. The first and second
flange portions project radially outward from opposite ends of the
bobbin. Inner peripheries of the first and second annular portions cover
the first and second flange portions. The first and second fishing line
entry prevention portions project from outer peripheries of the first
second flange portions. The first and second fishing line entry
prevention portions are provided across a slight gap between tip portions
of the first and second annular portions. The first and second fishing
line entry prevention portions prevent fishing line from entering between
the first flange portion and a first side plate and between the second
flange portion and the second side plate.