Abstract: The invention provides a photosensitive compound which can be used to prepare a photosensitive resin, and a photosensitive resin obtained from the compound. The compound has a moiety represented by formula (I) or (II): wherein R1 represents a hydrogen atom, an alkyl group, an aryl group, or an aralkyl group; Y is selected from the following formula groups:  wherein each of R2 and R3 represents a hydrogen atom, an alkyl group, an aryl group, or an aralkyl group, and l is an integer of 1 to 5; and Ar is selected from the following formula groups:  wherein X represents lithium, sodium, potassium, ammonium, monoalkylammonium, dialkylammonium, trialkylammonium, or tetraalkylammonium.