  Sub-TeV gamma-ray emission from the North-West rim of the supernova remnant
RX J0852.0$-$4622 was detected with the CANGAROO-II telescope and recently
confirmed by the H.E.S.S. group. In addition, the H.E.S.S. data revealed a very
wide (up to two degrees in diameter), shell-like profile of the gamma-ray
emission. We have carried out CANGAROO-III observations in January and February
2005 with three telescopes and show here the results of three-fold coincidence
data. We confirm the H.E.S.S. results about the morphology and the energy
spectrum, and find the energy spectrum in the NW-rim is consistent with that of
the whole remnant.
