Headrest device

A headrest device comprising:

• a front-rear movement mechanism that moves a moving member in a seat front-rear direction with respect to a base member supported at an upper end portion of a seatback;
• a head support section that is coupled to the moving member so as to be capable of rotating about an axis running in a seat left-right direction, and that includes a front face configuring a support face to support a head of a seated occupant;
• and
• an angle changing mechanism that includes a link member spanning between the head support section and the base member, the link member being rotated with respect to the base member about an axis running in the seat left-right direction by the movement of the moving member so as to rotate the head support section with respect to the moving member about an axis running in the seat left-right direction,
• wherein:
• the link member is formed with a rotation groove and an angle changing groove, each being open toward a seat left-right direction side;
• and
• the angle changing mechanism includes
• a first projection that projects from the moving member and fits together with the rotation groove, and that slides within the rotation groove during movement of the moving member with respect to the base member so as to rotate the link member with respect to the base member, and
• a second projection that projects from the head support section and fits together with the angle changing groove, and that slides within the angle changing groove during rotation of the link member with respect to the base member so as to rotate the head support section with respect to the moving member.