Finnknevatnet (Norwegian) or Saemienboelve  (Southern Sami) is a lake that lies in the municipality of Vefsn in Nordland county, Norway. The water flows out of the 3.79-square-kilometre (1.46 sq mi) lake to the north into the lake Hundålvatnet. It is located just north of the Lomsdal–Visten National Park.

• List of lakes in Norway
• Geography of Norway