Juhani Tamminen is a Finnish former professional ice hockey player and coach, born on December 30, 1954, in Helsinki, Finland. He played as a defenseman and had a notable career in both the Finnish leagues and internationally, representing Finland in various competitions, including the IIHF World Championships. After retiring as a player, Tamminen transitioned into coaching, where he led several teams in Finland and abroad. He is known for his passionate coaching style and has contributed to the development of ice hockey in Finland, influencing many young players throughout his career.