Olaf Haraldsen (died c. 1143) is a Danish anti-king who rules Scania for a few years from 1139.

He never wins control over the rest of Denmark, and he is not included in the list of Danish monarchs used by the Danish monarchy or Den Store Danske Encyklopædi.

He is sometimes called "Olaf II" even though there is a later Olaf II of Denmark.