PROBLEM TO BE SOLVED: To provide a wearable electrode that can accurately acquire a bioelectric signal under the shock-receiving environment, and provide an estimation device of a circulatory blood flow, an estimation method of the circulatory blood flow, an estimation device of the cardiac output and an estimation method of the cardiac output.;SOLUTION: A wearable electrode includes: an ear pad 12 and spats 21 being worn by a pilot 50; and electrodes 13, 22 mounted to the ear pad 12 and spats 21 and coming into contact with the pilot 50 to acquire a biological signal emitted from the pilot 50. The electrodes 13, 22 are mounted to the ear pad 12 and the spats 21 arranged among a helmet 60, a chair 70 and the pilot 50.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2019,JPO&INPIT
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