Cyclic amine compounds represented by formula (1): ** Formula ** or salts thereof or N-oxides thereof, in which Cy1 represents one selected from the group consisting of phenyl, naphthalene-1- ilo, fury-2-yl, fury-3-yl, thiophene-2-yl, thiophene-3-yl, pyrrole-2-yl, pyrrole-3-yl, oxazol-2-yl, oxazol-4-yl, oxazol-5-yl, thiazol-2-yl, thiazol-4-yl, thiazol-5- yl, isoxazol-3-yl, isoxazol-4-yl, isoxazol-5-yl, isothiazol-3-yl, isothiazole- 4-yl, isothiazol-5-yl, imidazol-2-yl, imidazol-4- yl, imidazol-5-yl, pyrazol-3-yl, pyrazol-4-yl, pyrazole-5-yl, 1,3, 4-oxadiazol-2-yl, 1,3,4-thiadiazol-2-yl, 1,2,3-triazol-4-yl, 1,2,4-triazol-3-yl, 1,2,4- triazol-5-yl, pyridin-2-yl, pyridin-3-yl, pyridin-4-yl, pyridazin-3-yl, pyridazin-4-yl, pyrazin-2-yl, pyrimidin-2-yl, pyrimidin- 4-yl, pyrimidin-5-yl, 1,3,5-triazin-2-yl and 1,2,4-triazin-3-yl, X represents one selected from the group consisting of oxygen, sulfur, nitrogen sulfini lo and sulfonyl； R1 a and R2 a, R1 a and R4 a, R2 a and R3 a or R3 a and R4 a together form saturated rings； R1 a, R1 b, R2 a, R2 b, R3 a, R3 b, R4 a, R4 and R5, which do not form the saturated rings, are each independently hydrogen, hydroxyl, halogen, amino, nitro, cyano, formyl, alkyl, alkoxycarbonyl, alkoxy, haloalkyl, haloalkoxy, alkylthiocarbonyl, alkylsulfonylamino, haloalkylsulfonylamino, bis (alkylsulfonyl) amino, bis (haloalkylsulfonyl) amino or aryl； Cy2 represents one selected from the group consisting of aromatic hydrocarbon, fury-2-yl, fury-3-yl, thiophene-2-yl, thiophene-3-yl, pyrrole-2-yl, pyrrole-3-yl, oxazol-2-yl, oxazol-4-yl, oxazol-5-yl, thiazol-2-yl, thiazol-4-yl, thiazol-5- yl, isoxazol-3-yl, isoxazol-4-yl, isoxazol- 5-yl, isothiazol-3-yl, isothiazol-4-yl, isothiazol-5-yl, imidazol-4-yl, imidazol-5- yl, pyrazol-3-yl, pyrazole-4-yl, pyrazole-5- yl, 1,3,4-oxadiazol-2-yl, 1,3,4-thiadiazol-2-yl, 1,2,3-triazol-4-yl, 1,2,4-triazol-3- yl, 1,2,4-triazol-5-yl, pyridin-2-yl, pyridin-3-yl, pyridin-4-yl, pyridazin-3-yl, pyridazin-4-yl, pyrazin-2-yl, py
