Sven Otto "Sleven" Säfwenberg (21 May 1898 in Uppsala – 15 January 1950 in Gävle) was a Swedish bandy goaltender.

Säfwenberg underwent education in Påhlmans Handelsinstitut, Stockholm, in 1923 and had various jobs in the sports equipment industry in Germany, Czechoslovakia, and Sweden from 1920 to 1927.

Sven Säfwenberg played in two clubs, IK Sirius and IFK Uppsala.

Sune Almkvist persuaded him to choose IFK Uppsala, where he took over the goalkeeper spot for Seth Howander, which instead became a right defencemen.

He played one match for Sweden's national team in ice hockey in 1921 and became European Champion.