An aniline derivative represented by formula: wherein R 10 represents heptafluoro-n-propyl, heptafluoro-i-propyl, 1,1,1,3,3,3-hexafluoro-2-propyl, 1,1,1,3,3,3-hexafluoro-2-chloro-2-propyl, 1,1,1,3,3,3-hexafluoro-2-bromo-2-propyl, or nonafluoro-n-butyl, nonafluoro-2-butyl, R 11 and R 12 each represent a hydrogen atom, Y 14 represents a halogen atom, a C1-C6 alkyl group, a C1-C6 haloalkyl group, a C1-C6 alkoxy group, a C1-C6 haloalkoxy group, a C1-C6 alkylthio group, a C1-C6 haloalkylthio group, a C1-C6 alkylsulfinyl group, a C1-C6 haloalkylsulfinyl group, a C1-C6 alkylsulfonyl group, a C1-C6 haloalkylsulfonyl group or a pentafluorosulfanyl group, Y 15 and Y 16 may be the same or different and each represent a hydrogen atom, a halogen atom, a C1-C6 alkyl group, a C1-C6 haloalkyl group, a C1-C6 alkoxy group, a C1-C6 haloalkoxy group, a C1-C6 alkylthio group, a C1-C6 haloalkylthio group, a C1-C6 alkylsulfinyl group, a C1-C6 haloalkylsulfinyl group, a C1-C6 alkylsulfonyl group, a C1-C6 haloalkylsulfonyl group, a pentafluorosulfanyl group, a cyano group, or a nitro group, and Y 17 represents a trifluoromethyl, pentafluoroethyl, heptafluoro-n-propyl, 2,2-difluoroethyl, 2,2-dichloroethyl, 1,3-difluoro-2-propyl, 1,3-dichloro-2-propyl, 1-chloro-3-fluoro-2-propyl, 1,1,1-trifluoro-2-propyl, 2,2,2-trifluoroethyl, 2,2,2-trichloroethyl, 2,2,2-tribromoethyl, 3,3,3-trifluoro-n-propyl, 4,4,4-trifluoro-n-butyl, 1,1,1,3,3,3-hexafluoro-2-propyl, 1,1,1,3,3,3-hexafluoro-2-chloro-2-propyl, 1,1,1,3,3,3-hexafluoro-2-bromo-2-propyl, 1,1,2,3,3,3-hexafluoro-2-chloro-n-propyl, 1,1,2,3,3,3-hexafluoro-2-bromo-n-propyl, 1,1,2,3,3,3-hexafluoro-1-bromo-2-propyl, 2,2,3,3,3-pentafluoro-n-propyl, 3,3,4,4,4-pentafluoro-2-butyl, nonafluoro-n-butyl, nonafluoro-2-butyl, 2-fluoroethyl, 2-chloroethyl, 2-bromoethyl, 2-iodoethyl, 3-fluoro-npropyl, 3-chloro-n-propyl, or 3-bromo-n-propyl, n-propyloxy, isopropyloxy, n-butoxy, s-butoxy, i-butoxy, and t-butoxy, a C1-C6 haloalkoxy group, ethylthio, n-propylthio, i-propylthio, n-butylthio, s-butylthio, and t-butylthio, a C1-C6 haloalkylthio group, a C1-C6 alkylsulfinyl group, a C1-C6 haloalkylsulfinyl group, a C1-C6 alkylsulfonyl group, a C1-C6 haloalkylsulfonyl group or a pentafluorosulfanyl group. wherein R 10 represents heptafluoro-n-propyl, heptafluoro-i-propyl, 1,1,1,3,3,3-hexafluoro-2-propyl, 1,1,1,3,3,3-hexafluoro-2-chloro-2-propyl, 1,1,1,3,3,3-hexafluoro-2-bromo-2-propyl, or nonafluoro-n-butyl, nonafluoro-2-butyl, R 11 and R 12 each represent a hydrogen atom, Y 14 represents a halogen atom, a C1-C6 alkyl group, a C1-C6 haloalkyl group, a C1-C6 alkoxy group, a C1-C6 haloalkoxy group, a C1-C6 alkylthio group, a C1-C6 haloalkylthio group, a C1-C6 alkylsulfinyl group, a C1-C6 haloalkylsulfinyl group, a C1-C6 alkylsulfonyl group, a C1-C6 haloalkylsulfonyl group or a pentafluorosulfanyl group, Y 15 and Y 16 may be the same or different and each represent a hydrogen atom, a halogen atom, a C1-C6 alkyl group, a C1-C6 haloalkyl group, a C1-C6 alkoxy group, a C1-C6 haloalkoxy group, a C1-C6 alkylthio group, a C1-C6 haloalkylthio group, a C1-C6 alkylsulfinyl group, a C1-C6 haloalkylsulfinyl group, a C1-C6 alkylsulfonyl group, a C1-C6 haloalkylsulfonyl group, a pentafluorosulfanyl group, a cyano group, or a nitro group, and Y 17 represents a trifluoromethyl, pentafluoroethyl, heptafluoro-n-propyl, 2,2-difluoroethyl, 2,2-dichloroethyl, 1,3-difluoro-2-propyl, 1,3-dichloro-2-propyl, 1-chloro-3-fluoro-2-propyl, 1,1,1-trifluoro-2-propyl, 2,2,2-trifluoroethyl, 2,2,2-trichloroethyl, 2,2,2-tribromoethyl, 3,3,3-trifluoro-n-propyl, 4,4,4-trifluoro-n-butyl, 1,1,1,3,3,3-hexafluoro-2-propyl, 1,1,1,3,3,3-hexafluoro-2-chloro-2-propyl, 1,1,1,3,3,3-hexafluoro-2-bromo-2-propyl, 1,1,2,3,3,3-hexafluoro-2-chloro-n-propyl, 1,1,2,3,3,3-hexafluoro-2-bromo-n-propyl, 1,1,2,3,3,3-hexafluoro-1-bromo-2-propyl, 2,2,3,3,3-pentafluoro-n-propyl, 3,3,4,4,4-pentafluoro-2-butyl, nonafluoro-n-butyl, nonafluoro-2-butyl, 2-fluoroethyl, 2-chloroethyl, 2-bromoethyl, 2-iodoethyl, 3-fluoro-npropyl, 3-chloro-n-propyl, or 3-bromo-n-propyl, n-propyloxy, isopropyloxy, n-butoxy, s-butoxy, i-butoxy, and t-butoxy, a C1-C6 haloalkoxy group, ethylthio, n-propylthio, i-propylthio, n-butylthio, s-butylthio, and t-butylthio, a C1-C6 haloalkylthio group, a C1-C6 alkylsulfinyl group, a C1-C6 haloalkylsulfinyl group, a C1-C6 alkylsulfonyl group, a C1-C6 haloalkylsulfonyl group or a pentafluorosulfanyl group.