在这部全员集合！7大假面骑士！！动作/科幻片中,1976年1月3日10:30-11:25在毎日放送・TBS系播放的特别节目。
某日，立花藤兵卫带着一群小孩子到游乐场“後楽園ゆうえんち”观看假面骑士的舞台剧表演，并且在观看表演时回想起以往与假面骑士一起生活的日子。而在藤兵卫一边回想的时侯，本乡、一文字等真正的假面骑士也相继来探望他。
正当藤兵卫回忆完后，表演台上一片骚动，原来台上出现了真正的怪人。见此情况，本乡猛、一文字隼人、风见志郎、结城丈二、神敬介、山本大介、城茂等人相继变身与之战斗，并且在表演台下找到敌人的首脑暗黑大将军。最终，7位骑士消灭了所有的怪人，粉碎了暗黑大将军的阴谋。
The special opens with Tobei Tachibana taking some kids to a Kamen Rider Show. Just as he is reminiscing about all the heroic modified humans he is lived alongside (Rider 1, Rider 2, V3, Riderman, X, Amazon, Stronger, and Tackle), the first seven Riders gradually show up to greet him in their human guises, unrecognized by the crowds. When it is revealed that the kaijin onstage are real, not actors, the Riders transform to save the crowd and Rider actors, uniting their power to defeat the Delza Armys true leader, Great General Darkness in his hideout beneath the stadium.
