Folding support structure comprising a set of coplanar support points, including at least two rear support points and at least one front support point, and at least two folding devices each comprising: • a set of lower arms (12, 13) comprising at least one front arm and one rear arm, each comprising a first end (R1, R2 respectively), each being connected to a support point; • an antiparallelogram (CDEF) that can deform in a vertical plane, said at least one antiparallelogram (CDEF) comprising two crossed segments (CD, EF) with: • a first end and a second end each being fixed by a first and a second attachment to a first end of the front lower arm and a first end of the rear lower arm respectively; • a third end and a fourth end each being fixed by a third and a fourth attachment to a first point of the front lower arm and a first point of the rear lower arm respectively; • the antiparallelogram (CD, EF) deforming by folding between a first position (POS_3) of the structure called the unfolded position, and a second position (POS_7) called the folded position, changing from the first position to the second position causing a reduction in the base width of the structure, the structure comprising two sides, the distance separating the two sides defining the width of the structure, each of the sides being defined in a vertical plane and comprises at least one distinct rear support point for each of the sides and at least one front support point, said support structure comprising two folding devices, each comprising an antiparallelogram (CDEF) that can deform in the plane of one of the sides of the structure, the structure being characterised in that it also comprises a central folding system that can reduce the separation distance along the direction of the structure width when changing from the first position called the unfolded position to the second position, called the folded position. • a set of lower arms (12, 13) comprising at least one front arm and one rear arm, each comprising a first end (R1, R2 respectively), each being connected to a support point; • an antiparallelogram (CDEF) that can deform in a vertical plane, said at least one antiparallelogram (CDEF) comprising two crossed segments (CD, EF) with: • a first end and a second end each being fixed by a first and a second attachment to a first end of the front lower arm and a first end of the rear lower arm respectively; • a third end and a fourth end each being fixed by a third and a fourth attachment to a first point of the front lower arm and a first point of the rear lower arm respectively; • a first end and a second end each being fixed by a first and a second attachment to a first end of the front lower arm and a first end of the rear lower arm respectively; • a third end and a fourth end each being fixed by a third and a fourth attachment to a first point of the front lower arm and a first point of the rear lower arm respectively; • the antiparallelogram (CD, EF) deforming by folding between a first position (POS_3) of the structure called the unfolded position, and a second position (POS_7) called the folded position, changing from the first position to the second position causing a reduction in the base width of the structure,