To provide a blue-luminescent ink composition that has excellent emission intensity and durability and gives written characters and printed infor mation having excellent visibility and solidity, even when the blue ink is printed on the fluorescent brightening agent-including paper.

The blue light-emitting ink composition includes a light-emitting compound represented by formula [wherein R1 is H, a 1-4C alkyl, a 1-4C alkoxy or a halogen; R is a 1-20C fluorine-including alkyl, a substituted or unsubstituted 1-4C alkyl, a substituted or unsubstituted 7-10C aralkyl or a substituted or unsubstituted 6-12C aryl and M is a divalent or trivalent metal (where the rare earth metal and alkali and alkaline earth metal are excluded) and m is an integer of 2 or 3].