Lukáš Jašek (born 28 August 1997) is a Czech professional ice hockey forward who is currently playing under contract to Lahti Pelicans of the Finnish Liiga.
Jašek made his Czech Extraliga (ELH) professional debut playing with HC Oceláři Třinec during the 2014–15 Czech Extraliga season. He was selected in the sixth round, 174th overall, by the Vancouver Canucks in the 2015 NHL Entry Draft.
On April 20, 2018, Jašek signed a three-year, entry-level contract with the Vancouver Canucks of the NHL. He was assigned to the Canucks AHL affiliate, the Utica Comets for the remainder of the 2017–18 season.