Jim Marthinsen (born 15 April 1956) is a retired Norwegian ice hockey goaltender, who played for the club Vålerenga Ishockey and for the Norwegian national team. He participated at the Winter Olympics in 1980, 1984, 1992 and 1994. He was seven times Norwegian Champion with the club Vålerenga, and three times with the Storhamar Dragons. He was awarded the Gullpucken as best Norwegian ice hockey player twice.