Slovenská informačná služba (, SIS) is an intelligence agency of the government of Slovakia. It was established on January 21, 1993 as a descendant of the Federálna bezpečnostná informačná služba (the intelligence agency of Czechoslovakia). Slovenská informačná služba is one out of four Secret Services in Slovakia, the other three being Vojenská spravodajská služba (VSS), Vojenské obranné spravodajstvo (VOS) and Národný bezpečnostný úrad (NBÚ).