Saulius Pakalniškis (born 15 June 1958 in Staškūniškis, Anykščiai district municipality-21 February 2006) was a Lithuanian zoologist, entomologist and dipterologist (researcher of flies).
For a time he worked at Jonava furniture factory, and then served in the Soviet Army.
After returning from her, attended preparatory courses, preparing to enroll in the Vilnius University.
He was a researcher at Institute of Ecology of Vilnius University, member of Lithuanian Entomological Society.
He published research articles and participated in a number of scientific expeditions in Lithuania, Latvia, Belarus and other countries.