Lasse Juhani Kukkonen (born 18 September 1981) is a retired Finnish professional ice hockey defenceman.

Earlier in his career, he had a four-year stint in the National Hockey League (NHL) with the Chicago Blackhawks and Philadelphia Flyers.

After his career in ice hockey, Kukkonen is working as a lecturer and trainer specialising in mental coaching and leadership.

He played ten National Hockey League games during the 2003–04 NHL season, after which he returned to his hometown Kärpät in the SM-liiga.

On 24 June 2009, Kukkonen signed a two-year deal with Russian team Avangard Omsk of the KHL.