According to the present invention, provided is an oral cavity sensor device comprising: a bendable sensor assembly detecting an X-ray to generate an electrical signal and a protection cover including a dome-shaped protruding unit located behind the sensor assembly in the progressing direction of an X-ray, penetrated by a transmission cable which is connected to the sensor assembly, and protruding toward the rear side. As the oral cavity sensor device is bendable against reaction force within a certain range, the oral cavity sensor device can reduce a feeling of irritation and pain of a patient.COPYRIGHT KIPO 2016본 발명은 X선을 검출하여 전기적 신호를 생성하는 휘어짐 가능한 센서 어셈블리와 X선의 진행방향에 대해 상기 센서 어셈블리의 후방에 위치하고, 상기 센서 어셈블리와 연결되는 전송 케이블이 관통되며 후방으로 돌출된 돔(dome) 형상의 돌출부를 포함하는 보호 커버를 포함하는 구강센서장치를 제공한다.
