Quis custodiet ipsos custodes?是一句拉丁文谚语，通常被认为出自古罗马诗人尤维纳利斯的讽刺作品《Satire VI》段落 347章8节，直译为「谁来把守守卫者？」，亦译「谁来监督监督者？」，这句话也有一些比较地道的翻译和改编，例「监管之人，谁人监管？」 。在现代的用法中，它的出现经常伴随有柏拉图政治哲学或者政治腐败等的问题，但是现在没有已知连接到柏拉图或者政治理论的原始来源。

Quis custodiet ipsos custodes? is a Latin phrase found in the work of the Roman poet Juvenal from his Satires (Satire VI, lines 347–8). It is literally translated as "Who will guard the guards themselves?", though is also known by variant translations.