Abstract: A container-piling spreader which prevents the positional slippage of the lower container, comprising (i) a spreader body having, on the four corners of its bottom surface, means for engaging and hanging a container, (ii) a pair of elevation guides, each elevation guide mounted on the opposite end of the spreader body swingably in a vertical plane and being extensible downward and contractible upward, (iii) a pair of guide frames, each guide frame mounted, horizontally and in the direction of width of the container, on the bottom of one of the paired elevation guides, (iv) a retractable stopper, provided on each guide frame, to catch the bottom of the container, (v) two pairs of guide flippers, the guide flippers of each pair mounted on both ends of one of the paired guide frames, (vi) two pairs of guide sheaves, each guide sheave mounted on a side of one of the guide flippers, (vii) one pair or two pairs of winches mounted on the spreader body, and (viii) two pairs of pulling strings, each pulling string wou