Rosenlewin Urheilijat-38, RU-38 for short, was a sports club based in Pori, Finland.

[1] 1960 RU-38 played in the Finnish Cup final by losing 1–3 for FC Haka.

[2] After RU-38 was merged with Karhut, Ässät inherited RU-38's football section.

RU-38 also made a short appearance in British espionage film Billion Dollar Brain that was partly shot in Finland.

[5] The most notable other athletes representing RU-38 were 1500-metre world record holder Olavi Salonen and 1960 Olympics pole vault bronze medalist Eeles Landström.