Alen Pajenk (born 23 April 1986) is a Slovenian volleyball player who plays for Olympiacos Praeus and the Slovenia national team.

[1] In 2013–14, he reached the Final Four of the Champions League and won the bronze medal after defeating VC Zenit Kazan.

[2][3] Jastrzębski Węgiel, including Pajenk, also finished in third place in the Polish Championship during the same season.

[4] On 14 August 2015, Slovenia, including Pajenk, won the 2015 European League.

[5] On 18 October 2015, he won the silver medal with Slovenia at the 2015 European Championship.