The present invention relates to a black dyes composition for ink-jet printing ink comprising (A) a compound of the following formula (I) ##STR00001## wherein, R.sub.1 is --SO.sub.2CH.sub.2CH.sub.2OSO.sub.3H or --SO.sub.2CH.dbd.CH.sub.2 or --SO.sub.2CH.sub.2CH.sub.2OH; M is H, Na or Li; (B) a compound of the following formula (II) ##STR00002## wherein, R.sub.1 is --SO.sub.2CH.sub.2CH.sub.2OSO.sub.3H or --SO.sub.2CH.dbd.CH.sub.2 or --SO.sub.2CH.sub.2CH.sub.2OH; M is H, Na or Li; and (C) a compound of the following formula (III) ##STR00003## wherein, R.sub.1 is --SO.sub.2CH.sub.2CH.sub.2OSO.sub.3H or --SO.sub.2CH.dbd.CH.sub.2 or --SO.sub.2CH.sub.2CH.sub.2OH; M is H, Na or Li; these compositions are particularly suitable for using in paper inkjet printing ink, and inkjet printing inks with good light-fastness and solubility are obtained.