| 摘要 |
A pressure detection device includes a case unit which has therein an accommodation space and a pressure introduction passage, and a pressure detection unit having a detection surface for detecting a pressure applied thereto. Two ends of the pressure introduction passage respectively have a first opening portion which is opened toward the accommodation space, and a second opening portion which is opened toward an exterior of the case unit. The pressure detection unit is accommodated in the accommodation space. The pressure introduction passage further has a third opening portion which is opened toward the exterior. The pressure detection unit is disposed to detect the pressure, with the first opening portion and the third opening portion being positioned at an upper side of the second opening portion.
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