Vehicle seat

A vehicle seat comprising a seat bottom with a seating surface configured to be moved in response to an impact from a direction corresponding to a front side of an occupant sitting on the seating surface in a crash of a vehicle, the seat bottom including:

• a base portion configured to be supported at a position fixed relative to a body of the vehicle;
• a movable frame configured to be movable together with the seating surface in a front-rear direction relative to the base portion;
• a tension generator provided at the base portion and configured to be activated in response to the impact;
• and
• a tension transmission member including a first portion, a second portion and a third portion, the tension transmission member being connected at one end of the first portion with the tension generator, and bifurcated at another end of the first portion into the second and third portions which another end of the first portion is connected with one end of the second portion and with one end of the third portion, the tension transmission member being connected at another end of the second portion with a seat belt anchor or a seat belt buckle and connected at another end of the third portion with the movable frame,
• whereby a tension generated by the tension generator activated causes the third portion of the tension transmission member to pull the movable frame rearward and at the same time causes the second portion of the tension transmission member to pull the seat belt anchor or the seat belt buckle.