This paper is entitled "Principles of Politeness in Umpasa Marhata Sinamot Toba Batak Society. Twins Is an oral tradition and cultural tradition owned by the community that functions as a medium to convey hopes, prayers, and advice about moral teachings that can be guided by the Toba Batak community. Umpasa Batak Toba is always displayed and its use heard in traditional ceremonial activities such as traditional birth ceremonies, marriage ceremonies, death ceremonies and so on. The aim of this research is to describe the principle of politeness in Umpasa Marhata Sinamot Toba Batak. The theory used in this paper is a theory that refers to Chaer's (2010) opinion about language politeness, using a qualitative descriptive analysis method. The research results show that in Umpasa Marhata Sinamot Toba Batak found politeness principles of wisdom, acceptance, generosity, humility, agreement, and sympathy. Keywords: Politeness, Umpasa, Marhata Sinamot, Batak, Toba