For the past two months archaeologists have been digging at the Stokke site, believed to be two separate Stone Age settlements
The human skull containing brain matter is among many findings unearthed at the dig.
It is hoped the skull can tell something about how it was to be a Stone Age human in Norway. It is not yet known whether the skull belongs to an animal or a child.
Gaute Reitan, dig site leader, said to NRK: "It is too early to say. We need help from bone experts."
Early tests date the skull to around 5,900 BC, showing it is almost 8,000 years old.