The season began in August 2016 and ended in July 2017.
The league's format changed from the previous season.
Twenty-three teams which played each other twice for a total of forty-four matches each.
The Champion and the runner-up earned promotion to the Primera División.
In the Primera B Nacional, clubs with an indirect affiliation with Argentine Football Association are relegated to the Torneo Federal A, while clubs directly affiliated are relegated to Primera B Metropolitana.