A fluorescent compound having the structure represented by the following (wherein R 1 and R 2 together form a 5-membered hetero ring containing at least one hetero atom selected from the group consisting of sulfur, oxygen, nitrogen and phosphorus; R 6 and R 7 together form a 5-membered hetero ring containing at least one hetero atom selected from the group consisting of sulfur, oxygen, nitrogen and phosphorus; Q represents a carbon atom or nitrogen atom; R 3, R 4 and R 5 independently represent a hydrogen atom or a group selected from the group consisting of halogen atoms, nitro group, cyano group, hydroxyl group, amino group, thiol group, carboxyl group, aldehyde group, sulfonic group, isocyanate group, thioisocyanate group, alkyl groups, alkenyl groups, alkynyl groups, alkoxy groups, alkoxycarbonyl groups, acyl groups, halogenoacyl groups, monoalkylamino groups, dialkylamino groups, alkylthio groups, alkylcarbonylamide groups, alkylamide carbonyl groups, monoalkylsilyl groups, dialkylsilyl groups, trialkylsilyl groups, monoalkoxysilyl groups, dialkoxysilyl groups, trialkoxysilyl groups, alkylsulfonyl groups, halogenosulfonyl groups, aryl groups and heteroaryl groups (provided that when Q is a nitrogen atom, R 4 does not exist); and R 8 and R 9 independently represent a halogen atom, alkyl group, alkenyl group, alkynyl group, alkoxy group, aryl group or heteroaryl group); wherein said hetero ring(s) formed by said R 1 and R 2, and/or said R 6 and R 7 independently has(have) a structure represented by the following: wherein in these formulae, X, Y and Z independently represent sulfur, oxygen, nitrogen or phosphorus atom; R 10 to R 13 independently represent a hydrogen atom or a group which does not inhibit the fluorescence of said compound by shortening the wavelength of the fluorescence, decreasing the molar extinction coefficient or decreasing the fluorescence quantum yield, and which is an electron donating group wherein said electron donating group is a C 1 -C 10 alkyl group, alkoxyphenyl group whose alkyl moiety has 1 to 10 carbon atoms, or dialkoxyphenyl group whose respective alkyl moieties have 1 to 10 carbon atoms. R 1 and R 2 together form a 5-membered hetero ring containing at least one hetero atom selected from the group consisting of sulfur, oxygen, nitrogen and phosphorus; R 6 and R 7 together form a 5-membered hetero ring containing at least one hetero atom selected from the group consisting of sulfur, oxygen, nitrogen and phosphorus; Q represents a carbon atom or nitrogen atom; R 3, R 4 and R 5 independently represent a hydrogen atom or a group selected from the group consisting of halogen atoms, nitro group, cyano group, hydroxyl group, amino group, thiol group, carboxyl group, aldehyde group, sulfonic group, isocyanate group, thioisocyanate group, alkyl groups, alkenyl groups, alkynyl groups, alkoxy groups, alkoxycarbonyl groups, acyl groups, halogenoacyl groups, monoalkylamino groups, dialkylamino groups, alkylthio groups, alkylcarbonylamide groups, alkylamide carbonyl groups, monoalkylsilyl groups, dialkylsilyl groups, trialkylsilyl groups, monoalkoxysilyl groups, dialkoxysilyl groups, trialkoxysilyl groups, alkylsulfonyl groups, halogenosulfonyl groups, aryl groups and heteroaryl groups (provided that when Q is a nitrogen atom, R 4 does not exist); and R 8 and R 9 independently represent a halogen atom, alkyl group, alkenyl group, alkynyl group, alkoxy group, aryl group or heteroaryl group);