A chromene compound which is represented by the following formula: wherein (i) Each of R 1 and R 2 is a sulfur-containing substituent represented by the following formula; (In the above formula, ring X is an aromatic hydrocarbon ring or aromatic heterocyclic ring, R 3 and R 4 are each independently an alkyl group, haloalkyl group, cycloalkyl group, alkoxy group, amino group, heterocyclic group containing a ring member nitrogen atom and bonded to the ring X bonded thereto via the nitrogen atom, halogen atom, aryloxy group or aryl group, "a" is an integer of 0 to 4, and when "a" is 2 to 4, a plurality of R 4 's may be the same or different.) (ii) R 1 is a sulfur-containing substituent represented by the above formula and R 2 is a hydrogen atom, hydroxyl group, alkyl group, haloalkyl group, cycloalkyl group, alkoxy group, amino group, heterocyclic group containing 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; or (iii) R 2 is a sulfur-containing substituent represented by the above formula and R 1 is a hydrogen atom, hydroxyl group, alkyl group, haloalkyl group, cycloalkyl group, alkoxy group, amino group, heterocyclic group containing 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, aryloxy group or aryl group; R 5 and R 6 are each independently a hydroxyl group, alkyl group, haloalkyl group, cycloalkyl group, alkoxy group, amino group, heterocyclic group having a ring member nitrogen atom and bonded to an aromatic ring bonded thereto via the nitrogen atom, cyano group, nitro group, formyl group, hydroxycarbonyl group, alkylcarbonyl group, alkoxycarbonyl group, halogen atom, aralkyl group, aralkoxy group, aryloxy group, aryl group or sulfur-containing substituent represented by the above formula, R 7 and R 8 are each independently a hydrogen atom, hydroxyl group, alkyl group, haloalkyl group, cycloalkyl group, alkoxy group, alkoxyalkyl group, formyl group, hydroxycarbonyl group, alkylcarbonyl group, alkoxycarbonyl group, halogen atom, aralkyl group, aralkoxy group, aryloxy group or aryl group, and R 7 and R 8, together with the 13-position carbon atom bonded thereto, may form an aliphatic hydrocarbon ring having 3 to 20 ring member carbon atoms, condensed polycyclic ring having an aromatic hydrocarbon ring or aromatic heterocyclic ring condensed to the aliphatic hydrocarbon ring, heterocyclic ring having 3 to 20 ring member atoms, or condensed polycyclic ring having an aromatic hydrocarbon ring or aromatic heterocylcic ring condensed to the heterocyclic ring, R 9 and R 10 are each independently a group represented by the following formula, group represented by the following formula, aryl group, heteroaryl group or alkyl group, (In the above formula, R 11 is an aryl group or heteroaryl group, R 12 is a hydrogen atom, alkyl group or halogen atom, and "m" is an integer of 1 to 3.) (In the above formula, R 13 is an aryl group or heteroaryl group, and "n" is an integer of 1 to 3.), R 9 and R 10 may form an aliphatic hydrocarbon ring together with the carbon atom bonded thereto, "b" is an integer of 0 to 2, "c" is an integer of 0 to 4, when "b" is 2, two R 5 's may be the same or different, and when "c" is 2 to 4, a plurality of R 6 's may be the same or different. (i) Each of R 1 and R 2 is a sulfur-containing substituent represented by the following formula; (In the above formula, ring X is an aromatic hydrocarbon ring or aromatic heterocyclic ring, R 3 and R 4 are each independently an alkyl group, haloalkyl group, cycloalkyl group, alkoxy group, amino group, heterocyclic group containing a ring member nitrogen atom and bonded to the ring X bonded thereto via the nitrogen atom, halogen atom, aryloxy group or aryl group, "a" is an integer of 0 to 4, and when "a" is 2 to 4, a plurality of R 4 's may be the same or different.) (ii) R 1 is a sulfur-containing substituent represented by the above formula and R 2 is a hydrogen atom, hydroxyl group, alkyl group, haloalkyl group, cycloalkyl group, alkoxy group, amino group, heterocyclic group containing 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; or (iii) R 2 is a sulfur-containing substituent represented by the above formula and R 1 is a hydrogen atom, hydroxyl group, alkyl group, haloalkyl group, cycloalkyl group, alkoxy group, amino group, heterocyclic group containing 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, aryloxy group or aryl group;