Locations are open at 7:00 and are expected to close at 10:00.
Prime Minister Peter Pellegrin's three-party coalition will likely lose most, polls conducted prior to the start of the vote have suggested.
Polls conducted prior to the elections have suggested an increase in the anti-corruption movement Customs People (OLANO).
Over four million citizens in Slovakia have the right to elect the new parliament, the Communist Council, choosing from 25 parties or groups competing in this election.
Election results are expected to be published on March 1st.
Macedonian journalist and his fiancée, Martina Kusniova, both 27, were killed outside their home in Bratislava in February 2018. The double murder triggered massive protests that led to Roberto Fico's resignation from the prime minister's post.
Kuciac had reported corruption links between politics and business.
