<p>A deinking agent comprising as an active ingredient an ester mixture prepared by reacting a natural fat or a reaction product between a natural fat and glycerol with a tetrahydric to dodecahydric alcohol in a ratio of 0.02/1 - 1/1 in terms of a molar ratio of the alcohol to the glycerol in the natural fat to prepare a mixture, and adding ethylene oxide and propylene oxide to the mixture. It gives a deinked pulp free from somberness and containing less unpeeled ink.</p>
