Vehicle seat having retractor mounted in seat back frame

A vehicle seat comprising:

• a seat back frame constituting a framework of the vehicle seat;
• a retractor received in an internal space of the seat back frame;
• and
• headrest poles which vertically extend through the retractor and are mounted to the retractor,
• wherein the retractor comprises:
• a first mount unit on which a pre-tensioner and a self-correction sensor are mounted;
• a second mount unit which is positioned at one side of the first mount unit and on which a spool and a load limiter are mounted;
• and
• a third mount unit which is positioned at another side of the first mount unit and on which another pre-tensioner is mounted, and
• wherein the headrest poles are respectively configured to extend through a space between the first mount unit and the second mount unit and a space between the first mount unit and the third mount unit.