Provided are an aluminium-oxy compound obtained through reaction of an
organoaluminium compound with water, which is soluble in hydrocarbon
solvents and in which the amount of the organoaluminium compound remaining
is at most 10% by weight; a carrier comprising the aluminium-oxy compound
and an inorganic compound; and a catalyst component for olefin
polymerization comprising the carrier and a transition metal compound. The
catalyst component for olefin polymer production comprises the
aluminium-oxy compound and gives polyolefins with good polymer morphology.
