We treated 3,164 patients with advanced cancer with dendritic cell therapy between July 2005 and March 2020. The effective rate in patients treated with dendritic cell therapy more than 3 times was 19.0%. Among them, we treated 133 cancer patients with a combination of immune checkpoint inhibitors and dendritic cell therapy between June 2015 and March 2020. The effective rate in these patients was 54.1%. We treated 98 cancer patients with dendritic cell therapy with neoantigens between March 2018 and March 2020. The effective rate in these patients treated with neoantigens was 38.7%. The effective rate in patients treated without neoantigens was 18.3%. Dendritic cell therapy with neoantigens enhanced the effective rate. The effective rate of dendritic cell therapy with both immune checkpoint inhibitors and neoantigens was 60.7%.