Sometimes there is the danger of aspiration of the foreign body by a patient during dental treatment. The aim of this study is to present an unusual accident in which a patient aspirated a broken part of a dental clamp when the clamp was placed on the maxillary posterior tooth, and to discuss prevention and management of such events. In this incident, bronchoscopy was performed and the aspirated foreign body was removed from the bronchial lumen. The follow-up controls revealed no complication. To prevent an aspiration of a dental clamp or a broken portion of it, we suggest that a piece of dental floss should be tied through both holes of the clamp and the patient should be placed in more upright position during the dental clamping procedure.