Jan Olov Lennart Rube (born 14 April 1952) is a Swedish former professional golfer, who was one of the best amateur players in Sweden in the 1970s.

Rube, at age 17, reached the final of the 1969 Swedish Junior Match-play Championship at Djursholm Golf Club in Stockholm.

The Swedish team finished second and Rube second individually on a score of 2-under par, five strokes behind winner Denis Watson, Rhodesia.

At the 1978 Eisenhower Trophy in Fiji, team Sweden finished a new all-time best 5th and Rube again tied 21st individually.

Since 1999, Rube resides outside Glumslöv, between Helsingborg and Landskrona on the eastcoast of Scania county in southern Sweden.