fatty acids for producing the deinking agent of the present invention include fatty acids semi hardened fatty acid and hardened fatty acid derived from animal oiles such as lard and tallow and vegetable oils such as olive oil palm oil soybean oil rapeseed oil linseed oil and coconut oil fish oils and the like and synthesized fatty acid having 10 to 24 of carbon atoms preferred are saturated or unsaturated straight chain fatty acid having 12 to 18 of carbon atoms these fatty acids may be used alone or as a mixture of two or more of them examples of the fatty acid alkyl esters usable in the invention include c 1 10 alkyl esters of the above fatty acid preferably c 1 3 alkyl esters such as methyl ester examples of the amines having at least two active hydrogens for producing the deinking agent of the present invention include mono di and trialkanol amines which have 2 to 12 of carbon atoms among these preferred are monoethanol amine diethanol amine and triethanol amine more preferably triethanol amine examples of the alkylene oxides for producing the deinking agent of the present invention include ethyleneoxide propyleneoxide butyleneoxide and the like it may be used singly or in combination when two or more alkylene oxides are used the alkylene oxides may be added to the reaction product by using a mixture of two or more alkylene oxides random addition or successive adding of the alkylene oxides block addition in particular the random addition or the block addition using a.