Maior cajueiro do mundo or Cajueiro de Pirangi (en: world's largest cashew tree or cashew tree of Pirangi) is a cashew tree in Pirangi do Norte, Rio Grande do Norte, Brazil. In 1994, the tree entered the Guinness Book of Records. It covers an area between 7,300 square meters and 8,400 square meters (around 78,000 to 90,000 square feet). Having the size of 70 normally sized cashew trees, it has a circumference of 500 meters (1,650 feet). The vicinity of the World's Largest Cashew Tree in North Pirangi is also main place for the sale of lace and embroidery in Rio Grande do Norte state.
The spread over a hectare of land was, unlike other trees, created by the tree's outwards growth which, when bent towards the ground (because of their weight), their branches tends to take new roots where it touches the ground. This may be seen in the images of the interior. It is now difficult to distinguish the initial trunk from the rest of the tree.
It is said the tree was planted in 1888. However, based on its growth nature, it is also believed that "the tree is estimated to be more than a thousand years old.". The tree produces over 60,000 fruits each year.