A folding type seat of the present invention includes a body section supporting bracket, supporting a body section of a reclining mechanism, and a passive section supporting bracket, supporting a passive section of the reclining mechanism, which are located inward of external surfaces of a seat cushion or a seat back at positions spaced therefrom by predetermined distances. At least one of the brackets is provided with an impact absorbing section, which is caused to deform for absorbing impact energy imparted to a vehicle.