诉诸贫贱（英语：appeal to poverty；拉丁语：argumentum ad lazarum）是一种起源谬误，主张贫贱者才诚实，观点才正确，而富足者的观点不正确。

例一

流浪汉说房子很难买，这一定是真的。

例二

僧侣们放弃了所有的物质与财富，他们一定得到了上帝的启示与无上的智能。

例三

家庭农场是那么努力地在生存线挣扎，我们一定要帮助他们。

Argumentum ad lazarum or appeal to poverty is the formal fallacy of thinking a conclusion is correct because the speaker is poor, or it is incorrect because the speaker is rich. It is named after Lazarus, a beggar in a New Testament parable who receives his reward in the afterlife.