An optically active quaternary ammonium salt compound represented by formula, wherein R 1 represents a C 1-8 alkyl which is optionally substituted and which is linear, branched, or cyclic, a C 6-14 aryl which is optionally substituted, or a C 1-8 alkoxy which is optionally substituted and which is linear, branched, or cyclic; R 2 and R 21 each independently represents hydrogen, a C 1-8 alkyl which is optionally substituted and which is linear, branched, or cyclic, a C 6-14 aryl which is optionally substituted, or a C 1-8 alkoxy which is optionally substituted and which is linear, branched, or cyclic; R 3 represents a C 6-14 aryl (which is optionally substituted by halogen, a C 1-8 alkyl which is optionally substituted by halogen and which is linear, branched, or cyclic, or a C 6-14 aryl), a C 3-8 heteroaryl (which is optionally substituted by halogen, a C 1-8 alkyl which is optionally substituted by halogen and which is linear, branched, or cyclic, or a C 6-14 aryl), or a C 7-16 aralkyl (which is optionally substituted by halogen, a C 1-8 alkyl which is optionally substituted by halogen and which is linear, branched, or cyclic, or a C 6-14 aryl), R 4 represents hydrogen; R 5 represents hydrogen, halogen, a C 1-8 alkyl which is optionally substituted and which is linear, branched, or cyclic, a C 1-8 alkoxy which is optionally substituted and which is linear, branched, or cyclic, a C 2-8 alkenyl which is optionally substituted, or a C 2-8 alkynyl which is optionally substituted; R 6 represents halogen, a C 1-8 alkyl which is optionally substituted and which is linear, branched, or cyclic, a C 1-8 alkoxy which is optionally substituted and which is linear, branched, or cyclic, a C 2-8 alkenyl which is optionally substituted, or a C 2-8 alkynyl which is optionally substituted, and R 5 and R 6 may bond to form an aromatic ring which is optionally substituted; ring A and ring B do not have a same substituent at the same time; symbols * and ** represent an optical activity having an axial chirality; and X- represents an anion. wherein R 1 represents a C 1-8 alkyl which is optionally substituted and which is linear, branched, or cyclic, a C 6-14 aryl which is optionally substituted, or a C 1-8 alkoxy which is optionally substituted and which is linear, branched, or cyclic; R 2 and R 21 each independently represents hydrogen, a C 1-8 alkyl which is optionally substituted and which is linear, branched, or cyclic, a C 6-14 aryl which is optionally substituted, or a C 1-8 alkoxy which is optionally substituted and which is linear, branched, or cyclic; R 3 represents a C 6-14 aryl (which is optionally substituted by halogen, a C 1-8 alkyl which is optionally substituted by halogen and which is linear, branched, or cyclic, or a C 6-14 aryl), a C 3-8 heteroaryl (which is optionally substituted by halogen, a C 1-8 alkyl which is optionally substituted by halogen and which is linear, branched, or cyclic, or a C 6-14 aryl), or a C 7-16 aralkyl (which is optionally substituted by halogen, a C 1-8 alkyl which is optionally substituted by halogen and which is linear, branched, or cyclic, or a C 6-14 aryl), R 4 represents hydrogen; R 5 represents hydrogen, halogen, a C 1-8 alkyl which is optionally substituted and which is linear, branched, or cyclic, a C 1-8 alkoxy which is optionally substituted and which is linear, branched, or cyclic, a C 2-8 alkenyl which is optionally substituted, or a C 2-8 alkynyl which is optionally substituted; R 6 represents halogen, a C 1-8 alkyl which is optionally substituted and which is linear, branched, or cyclic, a C 1-8 alkoxy which is optionally substituted and which is linear, branched, or cyclic, a C 2-8 alkenyl which is optionally substituted, or a C 2-8 alkynyl which is optionally substituted, and R 5 and R 6 may bond to form an aromatic ring which is optionally substituted; ring A and ring B do not have a same substituent at the same time; symbols * and ** represent an optical activity having an axial chirality; and X- represents an anion.