  We investigate f_0-sigma mixing in the framework of light cone QCD sum rules
and by employing the experimental results about the decay widths and the masses
of these scalar mesons we estimate the scalar mixing angle by using sigma meson
data and f_0 meson data. The two values we thus obtain of the scalar mixing
angle are not entirely consistent with each other, possibly indicating that the
structure of these mesons cannot be simple quark-antiquark states.
