Provided is a stretchable electrode that does not bring about an increase in cost, a decrease in electrode characteristics, etc. due to degradation of resin caused by excessively long drying times at excessively high temperatures, and that is excellent in terms of washing durability, is safe for the skin and does not cause skin rash and skin inflammation due to a low molecular weight organic compound. The stretchable electrode is characterized by being used to be put in contact with the skin to measure biological signals, having an area of 1 to 500cm2, having a thickness of 10 to 800[mu]m, and in that the content of organic compounds contained in the stretchable electrode and having a molecular weight up to 2000 is of 1 to 5000ppm. By limiting the residual concentration of the low molecular weight organic component in the electrode, the washing durability is improved. Furthermore, onset of skin rash and skin inflammation, caused by gradual discharging of low molecular weight organic component from the electrode, and not by residual concentration of low molecular weight organic component in the electrode, is limited by controlling the concentration in the garment determined by the discharge speed of the low molecular weight organic compound.本發明之課題為提供一種伸縮性電極，不會因過度的長時間高溫乾燥所致之樹脂的劣化導致電極特性的降低或成本的增加，清洗耐久性優良，對於皮膚為安全，不會產生起因於低分子量有機化合物的接觸性皮膚炎、皮膚發炎。 該課題的解決手段為：就用以測定生物體資訊而接觸皮膚的伸縮性電極而言，係使用具有如下特徵之伸縮性電極：面積為1~500平方公分，厚度為10~800μm，伸縮性電極中含有之分子量2,000以下之有機化合物之含量為1~5,000ppm。藉由限制電極中之低分子量有機成分的殘留濃度而改善清洗耐久性，此外，產生接觸性皮膚炎、皮膚發炎的原因並不是電極中之低分子量有機成分之殘留濃度本身，而是從電極緩慢釋放出之低分子量有機成分，係從低分子量有機化合物之釋放速度來管理所要求之衣服內的濃度。
