Vehicle seat

A vehicle seat, comprising:

• a seat cushion;
• and
• a lifter device that moves the seat cushion up/down,
• wherein the lifter device includes:
• a side frame fixed to the seat cushion,
• a riser for mounting the seat cushion,
• a link member that couples the side frame and the riser to each other, and
• a clinching pin that couples the riser and the link member to each other,
• the link member includes a hole and is provided with a metal bush that covers an inner wall portion of the hole and portion of both faces of the link member,
• the clinching pin includes:
• a first portion located on an opposite side of the link member from the riser;
• a second portion located in a position corresponding to the hole of the link member;
• a third portion located in a position corresponding to a hole of the riser;
• and
• a fourth portion located on an opposite side of the riser from the link member,
• the first portion has a diameter greater than a diameter of the second portion and greater than an internal diameter of the metal bush,
• the second portion has a diameter greater than a diameter of the third portion and smaller than the internal diameter of the metal bush,
• the third portion has a diameter smaller than a diameter of the hole of the riser,
• the fourth portion has a diameter greater than the diameter of the third portion and greater than the diameter of the hole of the riser, and
• the second portion has an axial end surface facing the riser and adjacent to the third portion, the axial and surface being located away from a surface of the riser facing the second portion so as to define an interstice between the axial end surface and the surface of the riser.