OSLO, Dec 20 (Reuters) - Norway's Storebrand has agreed to buy the Norwegian unit of rival pension provider Danica from Danske Bank, the companies said on Monday.

Storebrand will pay 2.01 billion Norwegian crowns ($221.4 million) for Danica Pensjonsforsikring AS, the sixth largest provider of so-called defined contribution pensions in Norway with a 5% market share.

($1 = 9.0780 Norwegian crowns) (Reporting by Terje Solsvik; Editing by Tom Hogue)