The quaternary ammonium salt type cationic surfactant is formed by substituting four hydrogen atoms of the ammonium salt with an organic group, and is usually obtained by reacting a tertiary amine with an alkylating agent. The quaternary ammonium salt cationic surfactant has a strong basicity, does not produce a free amine in an alkaline solution, and is stable in nature. The quaternary ammonium salt type cationic surfactant has many excellent properties and can be used as an antistatic agent, a softening agent, a retarding agent, a fixing agent, etc. of a fiber, and can also be used as a hair styling agent for a disinfectant and a hair cosmetic. . According to the structure, the quaternary ammonium salt type cationic surfactant can be classified into an alkyltrimethylammonium salt type, a dialkyldimethylammonium salt type, an alkyldimethylbenzylammonium salt type, and the like.