Electrocardiogram lead wire

The utility model relates to the technical field of medical tools, and discloses an electrocardiogram lead wire which comprises an electrocardiograph, a limb lead main line is fixed to the left side of the upper surface of the electrocardiograph, a chest lead main line is fixed to the right side of the upper surface of the electrocardiograph, a first connecting part is fixed to the end, away from the electrocardiograph, of the limb lead main line, and a second connecting part is fixed to the end, away from the electrocardiograph, of the chest lead main line. Four limb lead branch lines are fixed to the face, away from the limb lead main line, of the first connecting part, limb lead heads are fixed to the ends, away from the first connecting part, of the four limb lead branch lines, and a first arrangement disc is arranged outside the face, away from the limb lead main line, of the first connecting part; a first through hole is formed in the first arrangement disc, a first chuck is fixed to the face, close to