Resumo. The National Park of Superagüi is located on the north coast of Paraná state. It is the largest continuous area of the Atlantic Forest remaining in the country and this biome is among the most threatened ones in the world. This area covers the north coast of the state and includes several conservation units of different categories, and the Environmental Protection Area of Guaraqueçaba, is the largest one. The objective of this study was to analyze the landscape structure (matrix and patches) of the National Park of Superagüi, and its buffer zone. The classification of land cover and the definition of the attributes of the area and perimeter were made using a digital image Landsat 5 TM. According to the landscape structure analysis, it was observed that the Park matrix is formed by native vegetation interrupted by the presence of patches. Approximately 7% of the studied area is composed by fragments, which belong to class of changed vegetation, exposed soil, urban areas, sand and water; mostly have less than one hectare and have a regular shape. The Park buffer zone is not fully incorporated within the limits of Environmental Protection Area of Guaraqueçaba, where marine areas form a great portion. It follows that landscape structure analysis, through its structural components matrix and patches, is an efficient subsidy to verify the park land cover functionality and its buffer zone.