The state of emergency was first declared on October 1 and was due to expire on November 14. After it was announced, a national curfew came into force on October 24, barring people from leaving their houses during the day without a negative coronavirus test except in certain circumstances.
People can leave their homes freely between the hours of 1 and 5 a.m.
Slovakia has also banned gatherings of more than six people since October 13, and indoor bars and restaurants, as well as gyms, cinemas and theatres, are closed.
The country has battled a surge in coronavirus cases since September.
It has registered 464 deaths since the start of the pandemic, of which 50 were recorded in the past 24 hours.
In the same window of time Slovakia registered 2,591 new cases and conducted 12,584 tests.
Slovakia has now registered 81,772 cases in total, according to official health data.