The invention relates to a prosthesis system with a liner (2) made of an electrically non-conducting liner material, which is intended to be pulled over an amputation stump, at least one electrode (10), which has at least one contact surface (14), and a prosthesis socket, which is intended to be arranged on the amputation stump, wherein the at least one electrode (10) is arranged on the inner face of the prosthesis socket, at least one area (6) of the liner (2) has a multiplicity of lead-throughs (8) from the inner face (22) to the outer face (24) made of an electrically conducting material arranged in the liner material, and the at least one contact surface (14) of the at least one electrode (10) is intended to come into contact with at least one lead-through (8) during use.