Socialist Workers Party (Danish: Socialistisk Arbejderparti) is a Trotskyist political party in Denmark. SAP is the Danish section of the (reunified) Fourth International, and was founded in 1980 as a continuation of Revolutionære Socialisters Forbund (RSF) - Revolutionary Socialists' League.
SAP was a co-founder of the Red-Green Alliance in 1989 and its members are active within the Alliance.
SAP publishes the quarterly Socialistisk Information (SI).