An ink composition, which comprises: (A) a polyether modified poly silicon oxide represented by the following formula (I), and (B) a polyether modified poly silicon oxide represented by the following formula (II), water, water-soluble organic solvent, and a colorant. R1 is hydrogen atom, alkyl group or acetyl group, m1 is an integer greater than 0, n1 is an integer greater than 1, m1+n1 is an integer of 1~6, a1×n1 is an integer of 2~20, b1×n1 is an integer of 0~100, the ordering sequence of units a1 and b1 is not limited and may be arranged in random or blocks; R2, R3 are respectively hydrogen atom, alkyl group or acetyl group, m2 is an integer of 10~40, a2+a3 is an integer of 5~100, b2+b3 is an integer of 0~100, the ordering sequence of units a2 and b2, a3 and b3 is not limited and may be arranged in random or blocks. This invention has no bleeding problem because of its excellent wettability and permeability, color rendering and image uniformity are also excellent.