| abstract |
An aromatic amine derivative represented by the following formula (1), wherein at least one of Ar 1 to Ar 3 is represented by the following formula (2), wherein X 1 to X 3 are independently a nitrogen atom or CR 2 , provided that two of X 1 to X 3 are a nitrogen atom and X 1 and X 3 are not simultaneously a nitrogen atom. |