PROBLEM TO BE SOLVED: To provide an electrocardiographic waveform measuring apparatus in which, even when a sensor electrode is disposed at a position closer to the backrest surface of a seat, a user is not made to feel a sitting discomfort of the seat, and a high denoising effect is realized simultaneously.SOLUTION: An electrocardiographic waveform measuring apparatus comprises: a sensor electrode 2 disposed on a seat interior side of a seat skin material 101F which comes into contact with a user 10 on a seat 100 insulating material 3 which is disposed opposite to the sensor electrode 2 on the seat interior side of the sensor electrode 2, and which is made of elastic material having a thickness larger than the seat skin material 101F a guard electrode 4 disposed opposed to the sensor electrode 2 on the seat interior side of the insulating material 3 and a housing case 6 which is disposed opposed to the insulating material 3 on the seat interior side of the insulating material 3, and which accommodates a sensor circuit with an amplifier circuit to which a potential signal from the sensor electrode 2 is initially input.COPYRIGHT: (C)2015,JPO&INPIT【課題】センサ電極をシートの背もたれ面により近い位置に配置させたとしても、ユーザーにそのシートの座り心地の悪さを感じさせることを無くするとともに、高いノイズ除去効果も同時に実現した心電波形計測装置を提供する。【解決手段】心電波形計測装置は、シート100においてユーザー10と接触するシート表皮材101Fのシート内部側に配置されるセンサ電極2と、センサ電極2のシート内部側においてセンサ電極2に対向配置される、シート表皮材101Fよりも厚みのある弾性材からなる絶縁材3と、絶縁材3のシート内部側においてセンサ電極2と対向して配置されるガード電極4と、絶縁材3のシート内部側において該絶縁材3と対向して配置されるとともにセンサ電極2からの電位信号が最初に入力される増幅回路を有したセンサ回路を収容した収容ケース6と、を備える。【選択図】図3
