PROBLEM TO BE SOLVED: To provide a hair dye for a hairstyling iron which has sufficient dying properties and washability, and which can sufficiently suppress staining of the scalp or skin, and a method of dying hair using the same.SOLUTION: The hair dye for a hairstyling iron is characterized by comprising 50 to 98 mass% of an oil component and 0.01 to 10 mass% of an acidic dye with the water content being less than 3 mass%. Furthermore, the hair dying method is characterized in that the dye for a hairstyling iron is applied to the hair and is heat pressed by the hairstyling iron.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】 十分な染着性及び耐洗浄性を有しつつ、頭皮或いは皮膚への汚着を十分に抑制することができるヘアアイロン用染毛料及びそれを用いる染毛方法を提供すること。【解決手段】 ヘアアイロン用染毛料は、油分50~98質量%と、酸性染料0.01~10質量%と、を含有し、水の含有量が3質量%未満であることを特徴とする。また、染毛方法は、毛髪に上記ヘアアイロン用染毛料を塗布し、ヘアアイロンで加熱プレスすることを特徴とする。【選択図】 なし