Vehicle seat for a passenger, comprising: - a backrest having a front face directed towards the passenger and a rear face opposite the front face, and - a seat part having an upper face directed towards the passenger and a lower face opposite the upper face, the rear face of the backrest and/or the lower face of the seat part comprising at least one area that is deformable in the event of an impact, respectively towards the front face of the backrest and/or towards the upper face of the seat part, the front and rear faces of the backrest, and/or the upper and lower faces of the seat part, being located at a distance from one another, at least at said at least one deformable area, so as to define a clearance space, said at least one area that is deformable of the rear face of the backrest and/or of the lower face of the seat part being configured so as to deform, in the event of an impact sustained on the rear face of the backrest and/or the lower face of the seat part, in the clearance space without transmitting the impact, respectively in the front face of the backrest and/or the upper face of the seat part, characterised in that the rear face of the backrest and/or the lower face of the seat part comprising said at least one area that is deformable comprises a braided and/or woven and/or knitted fabric with uniform braiding and/or weaving and/or knitting, said at least one area that is deformable being obtained through a geometrical configuration that is different from the fixed structure of the seat in relation to the geometrical configuration of the deformable area before it is fastened onto the fixed structure. - a backrest having a front face directed towards the passenger and a rear face opposite the front face, and - a seat part having an upper face directed towards the passenger and a lower face opposite the upper face, the rear face of the backrest and/or the lower face of the seat part comprising at least one area that is deformable in the event of an impact, respectively towards the front face of the backrest and/or towards the upper face of the seat part, the front and rear faces of the backrest, and/or the upper and lower faces of the seat part, being located at a distance from one another, at least at said at least one deformable area, so as to define a clearance space, said at least one area that is deformable of the rear face of the backrest and/or of the lower face of the seat part being configured so as to deform, in the event of an impact sustained on the rear face of the backrest and/or the lower face of the seat part, in the clearance space without transmitting the impact, respectively in the front face of the backrest and/or the upper face of the seat part, characterised in that the rear face of the backrest and/or the lower face of the seat part comprising said at least one area that is deformable comprises a braided and/or woven and/or knitted fabric with uniform braiding and/or weaving and/or knitting, said at least one area that is deformable being obtained through a geometrical configuration that is different from the fixed structure of the seat in relation to the geometrical configuration of the deformable area before it is fastened onto the fixed structure.