PROBLEM TO BE SOLVED: To provide a hair pretreating agent, a hair repairing agent and the like that can "selectively" (or preferentially) protect and repair the hair according to the degree of damages and to provide a hair pretreating agent that protects, with a thicker coating, damaged hair than normal hair or hair ends than root portions of the hair thereby enhancing effects for suppressing or reducing permeation of a permanent agent thereby to make damaged hair (particularly the ends thereof) to be hardly cut with the same degree as healthy hair, permits permanent treatments of hair uniformly, homogeneously and balancedly without spots and exhibits excellent emulsion stability and shampoo resistance, a hair repairing agent that prevents occurrence of cut hair or split hair and exhibits very excellent repairing functions, and the like.SOLUTION: The multi-agent type hair treating agent comprises at least an agent A containing 0.10-20.0 wt.% of an organomodified silicone oil bearing at least two amine functional groups and an agent B containing 0.70-15.0 wt.% of a polybasic acid (salt) and/or an acid anhydride.COPYRIGHT: (C)2008,JPO&INPIT【課題】損傷の程度に応じて、毛髪を「選択的」(又は優先的)に保護・修復することができる毛髪前処理剤及び毛髪修復剤等の提供。さらには、毛より損傷毛が、また毛髪の根本部分より毛先が、より厚く被膜にて保護され、それ故、パーマネント薬剤の浸透抑制・低減効果もより大きく、その結果、健康毛と同程度に迄、損傷毛(特にその毛先)が切断されにくくなり、且つ頭髪を斑無く、均一・均質・均整にパーマネント処理することができる、乳化安定性並びに耐シャンプー性にも優れた毛髪前処理剤、並びに切れ毛・枝毛等の発生を防ぎ極めて優れた修復機能を有する毛髪修復剤等の提供。【解決手段】アミン系官能基を2個以上有する有機変性シリコーンオイルを0.10~20.0重量%含有するA剤、並びに多塩基酸(塩)及び/又は酸無水物を0.70~15.0重量%含有するB剤から少なくとも成る多剤式毛髪処理剤。【選択図】図1