detachable convenient, and without interfering with operation of the user, always provides a stable ECG signal measuring apparatus capable of measuring the electrocardiographic signal. ECG signal measuring device (1) is made of material having elasticity and conductivity, ear electrodes attached in contact with the site containing the boundary region between the pinna and the ear lobe which constitutes the outer ear (11) When, the upper arm electrode left and right ear to ear electrodes (11) is attached is mounted in contact with the opposite upper arm (15), it is connected to the ear electrodes (11) and the upper arm electrode (15), outer ear electrodes ( 11) and a signal processing unit for measuring the ECG signal is detected (51) by the upper arm electrode (15).着脱が容易で、かつ、使用者の動作を妨げることなく、常時、安定して心電信号を計測することが可能な心電信号計測装置を提供する。心電信号計測装置(1)は、弾性及び導電性を有する素材からなり、外耳を構成する耳介と耳朶との境界領域を含む部位に接触させて取り付けられる外耳電極(11)と、外耳電極(11)が取り付けられた外耳と左右が逆の上腕に接触させて取り付けられる上腕電極(15)と、外耳電極(11)及び上腕電極(15)と接続され、該外耳電極(11)及び上腕電極(15)により検出される心電信号を計測する信号処理ユニット(51)とを備える。
