The present invention provides an apparatus for protecting dental patient hearing through noise reduction, the apparatus comprising: a main body portion provided in a form that can be mounted on both ears of a user; a microphone module that is provided on one side of the main body portion and collects external sound signals generated from the outside; a noise filter module that is built in the main body portion and filters the external sound signals to block or reduces noise signals included in the external sound signals; and a speaker module that is built in the main body portion and provided on the other side of the main body portion corresponding to the ears of the user, and that outputs sound signals filtered by the noise filter module.