Many researchers have delimited objects' heights, mainly heights of the Earth surface for topographic mapping or digital elevation model (DEM), with SPOT-images by using stereo observe-systems. In this paper, we try to delimit buildings' heights from the shadow in a panchromatic SPOT-image. The heights of 42 buildings are calculated with this method and checked. The root-mean-square error is 3·69 m. A main inference comes from the blocked shadows.