Seat device

A seat device comprising:

• a seat cushion configured such that a sitting person is seated in the seat cushion;
• and
• a seatback configured to support an upper body of the sitting person, wherein:
• the seatback includes a seatback frame, a seatback pad placed on a front face of the seatback frame, and a seatback cover configured to cover a surface of the seatback pad;
• a plurality of stretch airbags is provided in a part of the seatback at a position corresponding to a lumbar part of the sitting person, the stretch airbags being configured to inflate and press a surface of the seatback to a direction approaching the sitting person;
• and
• the stretch airbags are placed to overlap each other in a thickness direction of the seatback such that the seatback pad is sandwiched between the stretch airbags, wherein:
• one or more refreshment airbags are further provided at the position corresponding to the lumbar part, the one or more refreshment airbags being smaller than the stretch airbags;
• and
• at least one of the stretch airbags is disposed on a front face side from the refreshment airbags.