Abstract: An electrocardiogram measurement unit comprises: a pair of positive and negative electrode bodies and constituting capacitive coupling electrodes and arranged in a non-contact state with a human body; a signal amplification unit that amplifies an electric signal from both the electrode bodies and outputs the amplified electric signal as an electrocardiographic signal; and an inverting output unit that inverts an in-phase signal of the electric signal from both the electrode bodies and outputs an inverted signal. The electrocardiographic signal measurement device comprises simultaneously both channels and when the electrocardiogram measurement unit to which the inverted signal from the inverting output unit is input to the positive electrode body is defined as a first channel, and the electrocardiogram measurement unit to which the inverted signal from the inverting output unit is input to the negative electrode body is defined as a second channel.