  We have conducted 1.1 mm ALMA observations of a contiguous $105'' \times
50''$ or 1.5 arcmin$^2$ window in the SXDF-UDS-CANDELS. We achieved a 5$\sigma$
sensitivity of 0.28 mJy, providing a flat sensus of dusty star-forming galaxies
with $L_{\rm IR} \sim6\times10^{11}$ $L_\odot$ (for $T_{\rm dust}$ =40K) up to
$z\sim10$ thanks to the negative K-correction at this wavelength. We detected 5
brightest sources (S/N$>$6) and 18 low-significance sources (5$>$S/N$>$4; these
may contain spurious detections, though). One of the 5 brightest ALMA sources
($S_{\rm 1.1mm} = 0.84 \pm 0.09$ mJy) is extremely faint in the WFC3 and
VLT/HAWK-I images, demonstrating that a contiguous ALMA imaging survey is able
to uncover a faint dust-obscured population that is invisible in deep
optical/near-infrared surveys. We found a possible [CII]-line emitter at
$z=5.955$ or a low-$z$ CO emitting galaxy within the field, which may allow us
to constrain the [CII] and/or the CO luminosity functions across the history of
the universe.
