Disputes that often occur are usually related to ownership of land, this is because of the important role of land in human life, so that land becomes an object that is prone to disputes or disputes between people, this occurs because human needs for land are increasing, but the land supply is relatively fixed. Notary as a public official trusted by the community to resolve land disputes through a peace deed made by a notary to ensure legality. The method used is empirical juridical research. Research data were collected through field studies through interviews with resource persons to obtain primary data and literature studies to obtain primary data. The focus in this research is to find out and analyze the authority of a notary public in resolving land disputes with a deed of peace. The results showed that 1) Notary was authorized to make a peace deed to guarantee legal certainty for the parties to settle land disputes in accordance with article 15 Paragraph (2) letter f of the UUJN and 2) The peace deed drawn up by a Notary Public is an Authentic Deed but not final binding like a van dading deed decided from the results of mediation in court.