The Great Belt Fixed Link (Danish: Den faste Storebæltsforbindelse) is the fixed link across the strait called the Great Belt (Storebælt), connecting the Danish towns of Korsør and Nyborg on the islands of Zealand (Sjælland) and Fyn (or Funen) respectively. It consists of a road suspension bridge and railway tunnel between Zealand and the islet Sprogø, as well as a box girder bridge between Sprogø and Funen. The "Great Belt Bridge" (Danish: Storebæltsbroen) commonly refers to the suspension bridge, although it may also be used to mean the girder bridge or the link in its entirety. The suspension bridge, known as the Eastern Bridge, has the world's third longest main span (1.6 km).

The link replaces the ferries which had been the primary means of crossing Great Belt for more than 100 years. After decades of speculation and debate, the decision to construct the link was made in 1986; while it was originally intended to complete the railway link three years before opening the road connection, the link was opened to rail traffic in 1997 and road traffic in 1998. At an estimated cost of DKK 21.4 billion (1998 prices), the link is the largest construction project in Danish history.

The everyday operation and maintenance of the link is done by the company A/S Storebælt under Sund & Bælt. In order to pay back the construction expenses, the road connection is a toll road, and train operators pay a fixed toll per train in order to cross. The link has reduced travel times significantly; previously taking about an hour by ferry, Great Belt can now be crossed in about 10 minutes.