The 2020 report of the Global Terrorism Index ranks Nigeria third among 163 countries on the scale of key global security trends and patterns of terrorism. This paper examines the impact of terrorism, banditry and kidnapping on human security in Nigeria. The paper posits that Nigeria continues to experience increasing insecurity and violence through frequent attacks by terrorist, bandits and kidnappers. These criminals continue to attack, rape and kill unarmed civilians, especially women, across the country, which has impacted negatively on human security in Nigeria. The paper then gives the primary purpose of government, which is to protect lives and property, our ranking on the global terrorism index 2020, the conceptual clarifications of human security, terrorism, banditry and kidnapping; factors that are responsible for such social ills and their impact on Nigeria and Nigerians. The documentary research method was used in gathering and analyzing data for this work. The paper asserts that between terrorists, bandits, and kidnappers, there is very little differences as one set of activities apparently service the other. The paper concludes that the indices that point to national security in which human security is the chief has been challenged seriously by terrorism, banditry and kidnapping.