An optical fiber ribbon splitting tool that accommodates an optical fiber ribbon
in guide groove portion and splits longitudinally the accommodated optical fiber
ribbon, where a cross section of the guide groove portion comprises a bottom portion
with a width slightly smaller than a width of an optical fiber ribbon to be split,
and side wall portions each composed of a straight-slant surface tilting so that
a groove width becomes narrower as closer to the bottom portion from an opening
portion in the guide groove portion.
