A device for measuring oral cavity pressure provided with a pressure measuring probe (1) in which a balloon (4) is held by a balloon base material (5), and a connecting member having an inner cavity for transmitting the pneumatic pressure in the interior of the balloon to a pressure detector (8) via the balloon base material. The connecting member is provided with: a probe attachment member (3) which is connected to the balloon base material in a detachable manner at the tip and which is disposed with a gripping section (3b) on the rear thereof； and a linking tube (6) for connecting the rear end of the probe attachment member with the pressure detector. The balloon is provided with a pressure receiving section (4a) and a tubular section (4b) and is joined to the tip of the balloon base material at the tubular section. The probe attachment member is provided with an angle indicating section (3b) with which it is possible to know a given rotating angle direction around an axis, and the angle formed by the lengthwise direction of the flat balloon and the rotating angle direction indicated by means of the angle indicating section is within a given range when the balloon base material and the probe attachment member are connected. It is possible to stably ensure a reliable and accurate measurement by using a pressure measurement probe that uses a flat balloon.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將前述氣球內部之空氣壓往壓力檢知部8傳遞之內腔之連通構件。前述連通構件具備於前端部可裝卸地連接有前述氣球基材且於其後部設有把持部3b之探針裝著構件3、將前述探針裝著構件之後端與前述壓力檢知部連接之連結管6。前述氣球具備受壓部4a與氣球管狀部4b並以前述氣球管狀部結合於前述氣球基材之前端部。於前述探針裝著構件設有使繞其內腔之軸之一定之旋動角度方向為可辨識之角度標示部3b，在連接有前述氣球基材與前述探針裝著構件之狀態下，前述氣球之扁平形狀之長軸方向與前述角度標示部顯示之前述旋動角度方向形成之角度在一定之範圍內。藉由使用扁平形狀之氣球之壓力測定探針而可安定確保良好之測定精度。
