An electrode lead of a pacemaker includes a metal conductive core and a carbon nanotube film. The metal conductive core defines an extending direction. The carbon nanotube film wraps around the metal conductive core. The carbon nanotube film includes a plurality of carbon nanotubes extending substantially along the extending direction of the metal conductive core. A bared part is defined at one end of the electrode lead. A pacemaker using the above mentioned electrode lead is also disclosed.