To provide a flow measuring device capable of precisely measuring flow of fluid.SOLUTION: A micrometer element MH, two micro wind direction elements MD1, MD2, and a temperature compensation resistive element are stored in a first through hole 48 and a second through hole 49 formed locally in an internal cylindrical body 50, thus preventing flow of fluid circulated in the internal cylindrical body 50 from being disturbed easily. A sensor terminal part 62 of a carrier resin film 52 derived through a first terminal takeout through hole 56 and a second terminal takeout through hole 57 from an area between the internal cylindrical body 50 and a middle cylindrical body 58 is clamped by outer peripheral surfaces of the internal cylindrical body 50 and the middle cylindrical body 58 in a circumferential part between a first cavity through hole 54 and the first terminal takeout through hole 56, thus suitably preventing leakage of fluid within the internal cylindrical body 50. Accordingly, flow of fluid flowing in the internal cylindrical body 50 can be measured precisely.SELECTED DRAWING: Figure 6【課題】流体の流れを高精度で計測可能な流れ測定装置を提供する。【解決手段】マイクロヒータ素子ＭＨ、２つのマイクロ風向素子ＭＤ１、ＭＤ２、および温度補償抵抗素子は内側円筒体５０に局所的に形成された第１貫通穴４８や第２貫通穴４９内に収容されるので、内側円筒体５０内を流通する流体の流れに乱れが生じ難くなる。また、内側円筒体５０と中間円筒体５８との間から第１端子取出用貫通穴５６および第２端子取出用貫通穴５７を通して導出された担体樹脂フィルム５２のセンサ端子部６２は、空洞用貫通穴５４と第１端子取出用貫通穴５６との間の周方向部位において内側円筒体５０と中間円筒体５８の外周面との間で挟圧されていて、内側円筒体５０内の流体の漏れが好適に防止される。これらにより、内側円筒体５０内を流れる流体の流れを高精度で計測可能となる。【選択図】図６
