PROBLEM TO BE SOLVED: To provide a deoxidizer where the oxygen absorption capacity of a granular deoxidizer is further improved.SOLUTION: A deoxidizer comprising a granule including a porous carrier and an oxygen absorption composition carried with the carrier and an inorganic fine particle attached to the surface of the granule is disclosed. The oxygen absorption composition contains a liquid agent involving an oxygen absorption substance, an alkaline compound and a transition metal compound. The liquid absorption amount of the inorganic fine particle is 2.0 g/g or more and the liquid absorption amount is measured by a method of absorbing a test liquid consisting of the liquid agent containing the oxygen absorption substance and a transition metal compound.SELECTED DRAWING: None