A pressure sensor device including: an absolute pressure sensor unit; a sensor case to accommodate the absolute pressure sensor unit; and an adhesive provided between the absolute pressure sensor unit and the sensor case to fix the absolute pressure sensor unit and the sensor case together, is provided. The sensor case has protrusions on the bottom surface, the absolute pressure sensor unit is provided above the protrusions, and there is space free of the adhesive at a part of a region between the absolute pressure sensor unit and the sensor case, and under the absolute pressure sensor unit.