The present invention relates to a water-based ink that contains pigment-containing polyester-based resin particles A, pigment-free polyester-based resin particles B, an organic solvent and water, in which a content of an organic solvent C having a boiling point of not higher than 235° C. in a whole amount of the organic solvent is not less than 90% by mass. The water-based ink of the present invention can be improved in rub fastness, solvent resistance and adhesion to a non-water absorbing printing medium with good balance therebetween, even when printed on the non-water absorbing printing medium.