According to Argentinian nationality law, individuals who have at least one Argentine-born parent are eligible for Argentine citizenship by descent. This rule is based on the principle of jus sanguinis (right of blood). Specifically:
These laws highlight Argentina’s approach to citizenship based on familial connections, especially for those with direct family relations to Argentine-born individuals.
Every person born in Argentinian territory is an Argentinian national. The children of an Argentinian national born in a foreign country can opt for Argentinian citizenship. Foreigners who have resided in the country for two uninterrupted years can acquire citizenship by naturalisation.
Here is the translation of the Argentine Constitution by the United Nations.