N射线 (法文：Rayon N，英文：N rays)是由法国物理学家布朗洛提出的辐射类型，起初受众人认同，但后来证实是幻象。事件受后世科学家引为实验者偏见之实例。

N rays (or N-rays) were a hypothesized form of radiation, described by French physicist Prosper-René Blondlot in 1903, and initially confirmed by others, but subsequently found to be illusory.