The present invention relates to a foldable
chassis for a pushchair, which comprises two foldable side components (1a), each side components comprises front support rods (2a, 2b) and rear support rods (3a, 3b); and a device for controlling the distance between the side components (1a, 1b) so as to make them be brought together in a compact folding position and be separated each other in a unfolding position, the foldable
chassis is characterized in that: the
chassis has a device for selectively combining the distance controlling device and the side components (1a) so as to two type foldings of the chassis adopting active and inactive states: compact folding, wherein the side components (1a, 1b) are folded at the same time under the
active state, each rear support rods (3a, 3b) are broght into and are basically parallel to the corresponding front support rods (2a, 2b), and the side components (1a, 1b) are brought by the distance controlling device; and flat folding, wherein each components (1a, 1b) are folded under the inactive state, the rear support rods (3a, 3b) are broght into and are basically parallel to the corresponding front support rods (2a, 2b), two side components (1a, 1b) keep partition each other, and the distance controlling device is separated from the side components (1a, 1b).