The present invention relates to an apparatus for puncturing a maxillary sinus, the apparatus including a main body gripped by an operator and having a puncturing tube, an ultrasonic probing unit disposed in the main body and configured to detect a posterior fontanel without bones along a direction from a middle meatus to a maxillary sinus, a puncturing unit disposed in the main body, and having a needle disposed at a front end of the puncturing tube and configured to cauterize the posterior fontanel using electricity and puncture the posterior fontanel and a cautery wire configured to pass through the puncturing tube and supply electricity to the needle, an operation unit disposed in the main body and configured to move the puncturing unit toward the posterior fontanel, and an irrigation tube disposed to be fitted to the cautery wire in the puncturing tube and installed at the posterior fontanel punctured by the needle.
