  \Archeops is a balloon--borne instrument dedicated to measuring cosmic
microwave background (CMB) temperature anisotropies at high angular resolution
($\sim$ 12 arcmin.) over a large fraction (30%) of the sky in the
(sub)millimetre domain (from 143 to 545 GHz). We describe the results obtained
during the last flight: the \Archeops estimate of the CMB angular power
spectrum linking for the first time \Cobe scales and the first acoustic peak,
consequences in terms of cosmological parementers favouring a flat-$\Lambda$
Universe. We also present the first measurement of galactic dust polarization
and accurate maps of the galactic plane diffuse (sub) millimetre emisson.
