PROBLEM TO BE SOLVED: To easily measure an electrocardiogram by the desired number of channels according to a subject.SOLUTION: There is provided a medical electronic instrument for measuring an electrocardiogram by using an electrode for an electrocardiogram. The medical electronic instrument includes an instrument body for measuring an electrocardiogram by the predetermined number of channels, and a connector provided to an electrode for an electrocardiogram, which is detachably attached to the instrument body for connecting the electrode for an electrocardiogram to the instrument body. The connector includes a channel indication part for indicating the number of channels to the instrument body when attached to the instrument body.SELECTED DRAWING: Figure 13COPYRIGHT: (C)2020,JPO&INPIT【課題】被検者に応じた所望の心電図のチャネル数で容易に測定すること。【解決手段】心電図用電極を用いて心電図を測定する医療用電子機器である。この医療用電子機器は、所定のチャネル数で心電図を測定する機器本体と、心電図用電極に設けられ、機器本体に着脱可能に取り付けられて心電図用電極を機器本体に連結するコネクタと、を有し、コネクタは、機器本体に取り付けられた際に、機器本体に対してチャネル数を指示するチャネル指示部を有する。【選択図】図13