The Institute for Supply Management said its index of national factory activity rose a bit in May, to 49.6 from April's 48.6.
But a reading below 50 represents contraction in the factory sector.
5月、ISM製造業景気指数は4月の48.6から49.6にわずかな上昇となったが、50未満の数値は下向きの経済を表す。