To provide a lead for organism implantation which can easily realize a removal through a vein even under a state wherein the lead tip is covered with a firm fibrous capsule after an implantation of the lead, an also, wherein there is no fear to generate an excessive inflammatory reaction to muscles of heart.

This lead for organism implant is equipped with a connecting member which performs a mechanical and electrical connection to a device for organism implant, at the first end part, and is equipped with an endocardium fixing member 3 which maintains a state wherein at least one electrode 2a is in contact with endocardium, at the other end. In this case, the member 3 is arranged in the vicinity of the electrode 2a, and at the same time, a stylet 10 which removes the member 3 from a base part 4 by an operation from the first end part, is provided as well.