Lino Lacedelli (4 December 1925 – 20 November 2009) was an Italian mountaineer. Together with Achille Compagnoni, on 31 July 1954 he was the first man to reach the summit of K2. He is also noted for betraying his teammates Pakistani Amir Mehdi and Italian Walter Bonatti and leaving them in a life-threatening situation in order to ensure that he reached the summit first.