In order to improve steering operation operability during cornering while maintaining a driver holding property, a seat apparatus is provided with: a seat back frame; a cornering sensor for detecting a cornering direction of a vehicle; and a control unit t...

Each part of the suspension layer is connected to specific units for generating, in each part of the layers, a cyclic movement having, in a top part of its course, a translation towards the rear, and control members (62) are provided for generating these m...