Abstract: The noise-canceling headphone includes a housing including a microphone collecting external noise and a speaker emitting a sound toward an opening of an external auditory canal of a user. The noise-canceling headphone generates a noise-canceling signal from a noise signal collected by the microphone, drives the speaker with the noise-canceling signal, and emits a noise-canceling sound having a phase opposite to that of the external noise. One microphone is provided outside a back cavity that is an acoustic space behind a diaphragm of the speaker in a housing, and a guide guiding the external noise to the microphone is provided in the housing.