The purpose of this study was to harmonization of laws concerning management of coastal marine areas and synchronization of regulations concerning management of coastal marine areas. This type of research is normative legal research, using a conceptual approach and a statute approach. The legal materials used in this study consist of primary, secondary and tertiary legal materials. The legal material that has been described in accordance with the main problem is then distributed, explored and then given an argument so that the whole forms a logically interconnected whole about the disclosure of logical rationale and the ontological basis for the issuance of laws governing coastal marine areas. The results of this study indicate that the laws and regulations are not synchronous, which means that they are not in harmony. The disharmony is very influential on the relationship of governmental authority. Because the relationship between the Government and the Regional Government should be synergized with each other in: (a) Carrying out tasks that have been attributed to the legislation, (b) Utilization of natural resources, (c) Granting of licenses, (d) Distribution of Results, (e) Determination of boundaries the region. As for the efforts taken, the government immediately made a norm as mandated in Law No. 23 Year 2014. Which then established the Regional Regulation. The substance of the PP and Perda emphasizes the portion of the Regency/City.