The 1908 Club Atlético Boca Juniors season was the squad's debuting season in Primera B (then named "Segunda División"), the 2nd. level of Argentine league system. After winning some friendly tournaments, the executives of the club decided to affiliate it to the Argentine Football Association. As there was no promotion and relegation system by then, Boca Juniors registered to the second level to play official competitions for the first time in the history of the club.