忍刀（しのびがたな）也被称作忍者刀（にんじゃとう），是忍者使用的刀。为了提高便携性和功能性，它被设计为适合剑武士的尺寸和形状。

• 忍者
• 日本刀

The ninjatō(忍者刀), ninjaken(忍者剣), or shinobigatana(忍刀) , are allegedly the preferred weapon that the Shinobi of feudal Japan carried. It is portrayed by modern ninjutsu practitioners (including Masaaki Hatsumi and Stephen K. Hayes) and is prominently featured in popular culture. Replicas of this weapon are also prominently on display in both the Koka Ninja Village Museum in Kōka, Shiga and the Iga-ryū Ninja Museum in Iga, Mie. Historically, there is no physical evidence for the existence of this "katana-like short sword legendarily used by ninja", though it is believed that they are based on the design of the wakizashi or chokutō swords.