Problem to be solved: to provide a living body information detecting apparatus excellent in safety and long term reliability.A biometric information detecting device according to one embodiment of the present disclosure is installed in an oral cavity, which is mounted on at least one of a sensor for detecting an external force applied to a tooth in the oral cavity, a sealing member for sealing the sensor, and a gums of the tooth and the oral cavity A holding member capable of holding the material is provided.Diagram【課題】安全性および長期信頼性に優れた生体情報検出装置を提供する。【解決手段】本開示の一実施の形態に係る生体情報検出装置は、口腔内に設置されるものであって、口腔内の歯に付与される外力を検出するセンサと、そのセンサを密封する封止部材と、歯および口腔内の歯茎のうちの少なくとも一方に取り付けられて封止部材を保持可能な保持部材とを有する。【選択図】図2