Hannya no Men, also known as Hannyamen or simply Hannya, is a mask of a female demon representing 'the face of a woman harboring jealousy and resentment' used in Noh theater.
般若の面（はんにゃのめん）、般若面、あるいは単に般若は、「嫉妬や恨みのこもる女の顔」としての鬼女の能面。