We present our preliminary results on study of exotic glueball state 0-- in QCD sum rules (SR). It was shown that previously used current for this state is doubtful. Therefore we have constructed new current for three gluon 0-- state. Using the new current, OPE of two current correlator was calculated up to dimension 8 gluon condensates. The direct instanton contribution was found to be zero. The preliminary estimation for mass of 0-- from QCD SR is about ~ 5-7 GeV2.