PROBLEM TO BE SOLVED: To provide an oxidative hair-dyeing agent using a coupler-containing composition in which change in dyed hair color tone due to long-term storage is suppressed.SOLUTION: A coupler-containing composition contains a coupler compound (I) and a compound (II). [X is in a cyclic structure, -OH denotes a hydroxy group bonded to X] [X is equal to X in (I) a bonding position of -O is equal to -OH group in (I), a bonding position of -S is adjacent to a bonding position of the -O]SELECTED DRAWING: NoneCOPYRIGHT: (C)2016,JPO&INPIT【課題】カプラー含有組成物を用いる、長期保管による染毛色調の変化が抑制された酸化染毛剤の提供。【解決手段】カプラー化合物(I)及び化合物(II)を含むカプラー含有組成物。[Xは環状構造、-OHはXに結合したヒドロキシ基][Xは(I)のXと同一;-Oの結合位置は(I)の-OH基と同一、-Sの結合位置は前記-Oの結合位置と隣接]【選択図】なし