Oto Pustoslemšek (born 18 March 1943 in Mežica) is a Slovenian former alpine skier who competed for Yugoslavia in the 1964 Winter Olympics, finishing 62nd in the men's downhill and 67th in the men's giant slalom.

• Oto Pustoslemšek at Olympics at Sports-Reference.com (archived)
• Oto Pustoslemšek at Olympedia