Assange says his columns in tabloid Aftonbladet will give perspective on the work of WikiLeaks, which has angered the Pentagon by releasing thousands of classified Afghan war documents.
One of Sweden's biggest papers, Aftonbladet is considered a strong voice for the left wing. It was harshly criticized by Israel last year for an article that suggested Israeli troops had harvested the organs of dead Palestinians.
Chief editor Jan Helin said Monday that Aftonbladet will help WikiLeaks get a publishing certificate in Sweden, in a move to take advantage of the country's whistle-blower protection laws. Assange has said WikiLeaks has servers in Sweden.