A device for measuring oral cavity pressure provided with: a pressure measuring probe (1) in which a balloon (4) formed from an elastic material is held by a balloon base material (5)； a connecting member having an inner cavity for transmitting the pneumatic pressure in the interior of the balloon by being connected thereto with the balloon base material therebetween； and a pressure detector (8) for detecting the transmitted pneumatic pressure by being connected to the rear end of the connecting member. The balloon is provided with a pressure receiving section (2a) which forms a closed space and a tubular section (2b) connected to the interior of the pressure receiving section, and the balloon is joined to the tip end of the balloon base material at the tubular section. The balloon base material is provided with a rib (5c) protruding outward along the outer circumference direction of the balloon-side end. It is possible, by using a pressure measuring probe that uses a flat balloon, to stably ensure a reliable and accurate measurement by inserting an appropriately adjusted balloon into the oral cavity.一種口腔關連壓力測定裝置，具備使氣球基材5保持氣球4之壓力測定探針1、具有透過前述氣球基材與前述氣球之內部連通並傳遞其空氣壓之內腔之連通構件、與前述連通構件之後端連接並檢測傳遞之空氣壓之壓力檢知部8。前述氣球具備形成閉鎖狀空間之受壓部4a與連通於前述受壓部之內部之氣球管狀部4b並以前述氣球管狀部結合於前述氣球基材之前端部。前述氣球基材係沿前述氣球側之前端部之外周方向設有往外方隆起之肋部5c。使用使用扁平形狀之氣球之壓力測定探針，可將氣球於適切之狀態插入口腔內並安定確保良好之測定精度。
