To provide an ink-jet white ink of active energy ray-curable type, wherein the white ink has high printing stability and good hiding property, and is particularly suitable for printing on the single-pass ink-jet printing system. An ink-jet white ink of active energy ray-curable type, comprising titanium oxide, a pigment dispersant, and a polymerizable compound, wherein the content of the titanium oxide is from 15 to 30% by weight with reference to the total weight of the ink, and wherein the weight average particle diameter of the titanium oxide is 180 to 250 nm. In an embodiment of the ink, the titanium oxide is titanium oxide that surface is treated with silica and the pigment dispersant comprises a basic dispersant.