Dudo () is a small rocky island in Annam-dong, Seo District, Busan, South Korea. It was designated as a part on December 20, 1972. It is located just south of Annam Park.
The island was possibly previously called Meoriseom () or Daegariseom (); the origin of these names is uncertain.
It has a height of , and an area of . The island has sheer cliffs and is very rocky and rugged. It has over a dozen large sea caves on its sides. On its top are various trees. Archaeological excavations have found a large number of dinosaur fossils on the island. There is an unmanned lighthouse on the island. The island is reportedly popular for fishing.
In 2022, plans were announced for a bridge to be constructed between the island and the mainland. Concurrently, a trail would be constructed around the island that would connect to a trail on the mainland.