A second season, titled A Certain Magical Index II, aired in Japan between October 8, 2010 and April 1, 2011, and was also streamed on Nico Nico Douga.
Musim kedua,berjudul A Certain Magical Index II ditayangkan di Jepang pada 8 Oktober 2010 sampai 1 April 2011,dan juga streaming di Nico Nico Douga..