The biological electrode device includes an electrode part (10) that is attached to a human body and acquires a biological signal, and a lead part (20) that leads the biological signal to the outside from the electrode part (10). The electrode part (10) is covered with a non-woven fabric (30) except for the part (13) in contact with the living body, and the lead part (20) is also provided on the front and back surfaces except for the lead-out end part (14) to the outside. The whole area is covered with a nonwoven fabric, and the nonwoven fabric (30) on the front and back surfaces of the electrode part (10) and the lead part (20) is the part except the part (13) in contact with the living body and the lead-out end part (14) to the outside. The entire periphery is joined, and the electrode (11) of the electrode part (10) and the thin film lead wire (21) of the lead part (20) are not exposed.生体電極具は、人体に貼り付けられて生体信号を取得する電極部（１０）と、生体信号を電極部（１０）から外部に導出するリード部（２０）とからなる。電極部（１０）は、生体に接する部分（１３）を除いて表裏面全域が不織布（３０）で被覆され、リード部（２０）も、外部への導出端部分（１４）を除いて表裏面全域が不織布で被覆されており、電極部（１０）とリード部（２０）の表裏面の不織布（３０）は生体に接する部分（１３）及び外部への導出端部分（１４）を除いてその全周周囲が接合して、電極部（１０）の電極（１１）とリード部（２０）の薄膜状リード線（２１）が露出していない。
