A chromene compound having a skeleton represented by the following formula: wherein R 3 is a second sulfur-containing substituent selected from the group consisting of thiol group, alkylthio group, alkoxyalkylthio group, haloalkylthio group, cycloalkylthio group, arylthio group, heteroarylthio group, alkylsulfonyl group, alkoxyalkylsulfonyl group, haloalkylsulfonyl group cycloalkylsulfonyl group, arylsulfonyl group, heteroarylsulfonyl group, hydroxysulfonyl group, alkylsulfinyl group, alkoxyalkylsulfinyl group, haloalkylsulfinyl group, cycloalkylsulfinyl group, arylsulfinyl group, heteroarylsulfinyl group and hydroxysulfinyl group, and a combination of R 1 and R 2 is selected from the following (i) to (v): (i) R 1 is an aryl group or a heteroaryl group, and R 2 is an electron donating group having a Hammett constant σ p of -0.1 or less selected from the group consisting of hydroxyl group, alkyl group, cycloalkyl group, alkoxy group, aryloxy group, aralkyl group, aralkoxy group, amino group and heterocyclic group having a ring member nitrogen atom and bonded to the carbon atom, to which the heterocyclic group is bonded, via the nitrogen atom; (ii) R 1 is an electron donating group having a Hammett constant σ p of -0.1 or less selected from the group consisting of hydroxyl group, alkyl group, cycloalkyl group, alkoxy group, aryloxy group, aralkyl group, aralkoxy group, amino group and heterocyclic group having a ring member nitrogen atom and bonded to the carbon atom, to which the heterocyclic group is bonded, via the nitrogen atom, and R 2 is an aryl group or a heteroaryl group; (iii) R 1 and R 2 are each a first sulfur-containing substituent selected from the group consisting of thiol group, alkylthio group, alkoxyalkylthio group, haloalkylthio group, cycloalkylthio group, arylthio group and heteroarylthio group; (iv) R 1 is the above first sulfur-containing substituent, and R 2 is a hydrogen atom, hydroxyl group, alkyl group, haloalkyl group, cycloalkyl group, alkoxy group, amino group, heterocyclic group having a ring member nitrogen atom and bonded to the 7-position carbon atom via the nitrogen atom, cyano group, nitro group, formyl group, hydroxycarbonyl group, alkylcarbonyl group, alkoxycarbonyl group, halogen atom, aralkyl group, aralkoxy group, aryloxy group or aryl group; and (v) R 1 is a hydrogen atom, hydroxyl group, alkyl group, haloalkyl group, cycloalkyl group, alkoxy group, amino group, aliphatic heterocyclic group having a ring member nitrogen atom and bonded to the 6-position carbon atom via the nitrogen atom, cyano group, nitro group, formyl group, hydroxycarbonyl group, alkylcarbonyl group, alkoxycarbonyl group, halogen atom, aralkyl group, aralkoxy group or aryloxy group, and R 2 is the above first sulfur-containing substituent. (i) R 1 is an aryl group or a heteroaryl group, and R 2 is an electron donating group having a Hammett constant σ p of -0.1 or less selected from the group consisting of hydroxyl group, alkyl group, cycloalkyl group, alkoxy group, aryloxy group, aralkyl group, aralkoxy group, amino group and heterocyclic group having a ring member nitrogen atom and bonded to the carbon atom, to which the heterocyclic group is bonded, via the nitrogen atom; (ii) R 1 is an electron donating group having a Hammett constant σ p of -0.1 or less selected from the group consisting of hydroxyl group, alkyl group, cycloalkyl group, alkoxy group, aryloxy group, aralkyl group, aralkoxy group, amino group and heterocyclic group having a ring member nitrogen atom and bonded to the carbon atom, to which the heterocyclic group is bonded, via the nitrogen atom, and R 2 is an aryl group or a heteroaryl group; (iii) R 1 and R 2 are each a first sulfur-containing substituent selected from the group consisting of thiol group, alkylthio group, alkoxyalkylthio group, haloalkylthio group, cycloalkylthio group, arylthio group and heteroarylthio group; (iv) R 1 is the above first sulfur-containing substituent, and R 2 is a hydrogen atom, hydroxyl group, alkyl group, haloalkyl group, cycloalkyl group, alkoxy group, amino group, heterocyclic group having a ring member nitrogen atom and bonded to the 7-position carbon atom via the nitrogen atom, cyano group, nitro group, formyl group, hydroxycarbonyl group, alkylcarbonyl group, alkoxycarbonyl group, halogen atom, aralkyl group, aralkoxy group, aryloxy group or aryl group; and (v) R 1 is a hydrogen atom, hydroxyl group, alkyl group, haloalkyl group, cycloalkyl group, alkoxy group, amino group, aliphatic heterocyclic group having a ring member nitrogen atom and bonded to the 6-position carbon atom via the nitrogen atom, cyano group, nitro group, formyl group, hydroxycarbonyl group, alkylcarbonyl group, alkoxycarbonyl group, halogen atom, aralkyl group, aralkoxy group or aryloxy group, and R 2 is the above first sulfur-containing substituent.