The present invention relates to a water-soluble azo compound represented by the following formula (1): ##STR00001## [wherein, n denotes 1 or 2, x denotes 2 to 4 and A denotes a divalent bonding group represented by one of the following general formulas (2) to (4): ##STR00002## (Wherein, y denotes an integer number of 2 to 6 and w denotes an integer number of 1 to 4)]or a salt thereof, and an ink composition containing it; it shows a hue having high vividness suitable for inkjet recording and provides a recorded matter having high water fastness, and the ink composition prepared using it is excellent in storage stability.

 
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