  The OPERA experiment has been designed to perform the first detection of
neutrino oscillations in direct appearance mode in the $\nu_{\mu}\to\nu_{\tau}$
channel, through the detection of the tau lepton produced in charged current
interaction on an event by event basis. The detector is hybrid, being made of
an emulsion/lead target and of electronic detectors. It exploited the CNGS muon
neutrino beam from CERN to Gran Sasso, 730 km from the source. Runs with CNGS
neutrinos were successfully carried out from 2008 to 2012. We report on the
large data sample analysed so far and give our results on the search for
$\nu_{\mu}\to\nu_{\tau}$ and $\nu_{\mu}\to\nu_{e}$ oscillations.
