  Charged excitons of composite fermions (CFs) are considered in the fractional
quantum Hall effect. Energies of the charged CF excitons are computed at
$\nu=1/3$ as a function of the size of exciton. We show that the charged CF
exciton with size of roton is lower in energy than the unbound state of a
neutral roton and a lone charge. Therefore we propose that the lowest-energy
excitation of the fractional quantum Hall effect is in fact due to the charged
excitons of composite fermions composed of two CF-particles and one CF-hole. We
believe that charged excitons of composite fermions shed new light on
interpreting the resonant inelastic light scattering experiments.
