Seat moving device for vehicle

A vehicle seat moving apparatus for moving a seat main body between an interior position of a vehicle cabin and an exterior position of the vehicle cabin that is positioned below the interior position, comprising:

• a slide base provided to a vehicle floor side so as to be horizontally movable between a retreated position and an advanced position;
• a driving device for moving the slide base;
• a pair of seat raising/lowering arms, each of which supports the seat main body at one end and is vertically rotatably attached to the slide base via a rotation fulcrum at the other end;
• and
• a pair of ascent/descent guide members, each of which is provided to the vehicle floor side and is adapted to guide one of said seat raising/lowering arms such that the seat raising/lowering arm is vertically rotated as the slide base moves, each ascent/descent guide member comprising a cam plate,
• wherein each seat raising/lowering arm is provided with a supported portion that comprises a roller that rolls on the cam plate and each ascent/descent guide member is provided with an inclined guide surface that is gradually lowered toward an exterior of the vehicle cabin, wherein as the slide base moves, the supported portion is moved along the inclined guide surface so that the seat raising/lowering arm is vertically tilted while a distance between the rotation fulcrum and the supported portion is maintained at a fixed interval, wherein each seat raising/lowering arm comprises two plates that are arranged at a predetermined interval and a connecting member that interconnects opposing end portions of the two plates, wherein the roller is disposed between the two plates, and wherein the seat raising/lowering arms and the ascent/descent guide members are respectively positioned on both sides of the slide base.