Gantoftadösen (also called Jättestugan - meaning giants house) is a slightly destroyed dolmen in Kvistofta, in the municipality of Helsingborg in Skåne in Sweden. The dolmen is registered with the RAÄ no. Kvistofta 14: 1, and was built between 3500 and 2800 BCE.
Gantoftadösen was built by the people of the funnel beaker culture (Swedish Trattbägarkulturen). The rectangular chamber was about 2.8 m long and 1.4 m wide. Three large bearing stones support a capstone 2.5 × 2.5 m and 1.0 m thick, which is split roughly in the middle. On the capstone (Swedish takhällen) there are nine bowls, by far the most common form of the Nordic petroglyphs.
Fastmårupsdösen is nearby.