His three books, "Kenpo Satsuyo" (Compendium of the Constitution), "Chikujo Kenpo Seigi" (Additional Commentaries on the Constitution), and "Nihonkoku Kenpo no Kihon Shugi" (Fundamental principle of the Constitution of Japan) were banned for violation of Publishing Act.
美濃部の著書である『憲法撮要』『逐条憲法精義』『日本国憲法ノ基本主義』の3冊は、出版法違反として発禁処分となった。