A branched stent includes a main branch having a tubular main lumen and a side branch that branches off from the main branch. The main branch and the side branch are made from a strand-shaped starting material. The side branch is configurable between a first state in which the side branch lies within the main lumen and a second state in which the side lies outside the main lumen. In the second state, the side branch defines a tubular side branch fluidically connected to the main lumen. The side branch is formed at least in part of a shape-memory material.