An acrylic resin emulsion for an aqueous inkjet ink, comprising a particulate acrylic resin having an acid value of 1 to 100 mgKOH/g, wherein an acid-group-containing monomer is present at a content mole ratio (As) in surface regions of particles of the particulate acrylic resin and present at a content mole ratio (At) in the overall acrylic resin particles as measured with a 1 H spin diffusion time of 5 ms, and a ratio (As/At) of the content mole ratio (As) to the content mole ratio (At) is not less than 9; wherein the acrylic resin emulsion is prepared by an n-stage emulsion polymerization (wherein n is an integer of not less than 2), wherein the following weight ratios (α) and (β) are satisfied: (α) a weight ratio / between an acid-group-containing monomer to be used in the first to (n-1)th polymerization stages and an acid-group-containing monomer to be used in the n-th polymerization stage is / = 0/100 to 40/60; and (β) a weight ratio / between a total weight of monomers to be used in the first to (n-1)th polymerization stages and a total weight of monomers to be used in the n-th polymerization stage is / = 99/1 to 60/40; wherein in the first polymerization stage, a monomer component including an acid-group-containing monomer and a (meth) acrylate monomer as a major component thereof is polymerized; wherein an additional monomer is copolymerized with the acid-group-containing monomer and the (meth)acrylate monomer; wherein the additional monomer is an ethylenically unsaturated monomer having two or more radically polymerizable double bonds; wherein in the subsequent second polymerization stage, a monomer component including an acid-group-containing monomer and a (meth)acrylate monomer as a major component thereof is added to the polymer obtained in the first stage for further polymerization; wherein an additional monomer other than the acid-group-containing monomer and the (meth)acrylate monomer is used; wherein the additional monomer is an ethylenically unsaturated monomer having two or more radically polymerizable double bonds. (α) a weight ratio / between an acid-group-containing monomer to be used in the first to (n-1)th polymerization stages and an acid-group-containing monomer to be used in the n-th polymerization stage is / = 0/100 to 40/60; and (β) a weight ratio / between a total weight of monomers to be used in the first to (n-1)th polymerization stages and a total weight of monomers to be used in the n-th polymerization stage is / = 99/1 to 60/40; wherein in the first polymerization stage, a monomer component including an acid-group-containing monomer and a (meth) acrylate monomer as a major component thereof is polymerized; wherein an additional monomer is copolymerized with the acid-group-containing monomer and the (meth)acrylate monomer; wherein the additional monomer is an ethylenically unsaturated monomer having two or more radically polymerizable double bonds; wherein in the subsequent second polymerization stage, a monomer component including an acid-group-containing monomer and a (meth)acrylate monomer as a major component thereof is added to the polymer obtained in the first stage for further polymerization; wherein an additional monomer other than the acid-group-containing monomer and the (meth)acrylate monomer is used; wherein the additional monomer is an ethylenically unsaturated monomer having two or more radically polymerizable double bonds.