Buarbreen or Buerbreen is a glacier in Ullensvang Municipality in Vestland county, Norway. It is an offshoot of the large Folgefonna glacier. The small glacial arm reaches down into the Buerdalen valley, just 6 kilometres (3.7 mi) southwest of the town of Odda. The glacier is split into two parts, one on either side of a small mountain peak. Both sides drain into the Jordalselvi river which flows out through the valley into the lake Sandvinvatnet.