Purpose of writingto find out the effectiveness of legal protection for former terrorist convicts related to the deradicalization program linked to Law Number 5 of 2018 concerning Eradication of Criminal Acts of Terrorism and to find out the dangers of understanding radicalism and acts of terrorism. Therefore the research method includes research specifications, namely analytical descriptive The normative juridical approach method, through the library research stage, namely researching and reviewing secondary data obtained through library study data collection techniques, which then secondary data is analyzed in a juridical -qualitative manner.