To provide a washing composition for scalp and hair which is suitable for washing scalp and hair and massaging scalp in a situation in which washing away cannot be performed such as for the purpose of care, medical treatment and cosmetic purpose, a protection composition for scalp and hair which can easily wipe the washing composition for scalp and hair which is used for washing hair and scalp and massaging the scalp from a scalp of a person and achieve prevention of damage of hair, and protection of the scalp and hair, a scalp/hair treatment kit combining them, and a scalp/hair treatment method using the same kit.SOLUTION: There is provided a washing composition for scalp and hair comprising: an anionic polymer thickening when cation is added thereto and having no salt tolerance; and a nonionic surface active agent. There is also provided a protection composition for scalp and hair comprising: a protection component formed of any one kind or more kinds selected from trimethylglycine, amino acid, collagen, keratin, ceramide, hyaluronate, Sapindus extract, quillai extract; and salt. There are also provided a scalp/hair treatment kit combining them, and a scalp/hair treatment method using the same kit.SELECTED DRAWING: None【課題】介護や医療、美容目的など、洗い流すことができない現場で、頭髪や頭皮の洗浄やマッサージを行うのに適している頭皮頭髪洗浄用組成物と、同じく、洗い流すことができない現場で、頭髪、頭皮の洗浄やマッサージに使用された前記頭髪洗浄用組成物を頭髪、頭皮から簡単に拭き取ることを可能にすると共に頭髪の損傷防止、等の頭髪、頭皮保護の役割を果たす頭皮頭髪保護用組成物。また、これらを組み合わせた頭皮頭髪処理用キットと、これを用いて行う頭皮頭髪処理方法。【解決手段】カチオンを加えることで増粘する耐塩性のないアニオン性高分子と、ノニオン界面活性剤とを含有する頭皮頭髪洗浄用組成物。トリメチルグリシン、アミノ酸、コラーゲン、ケラチン、セラミド、ヒアルロン酸、ムクロジエキス、キラヤエキスの中のいずれか一種以上からなる保護成分と、塩類とを含有する頭皮頭髪保護用組成物。これらを組み合わせてなる頭皮頭髪処理用キット。これを用いて行う頭皮頭髪処理方法。【選択図】なし