The side impact absorber made of steel sheet for a motorcar, particularly for a car door has a hat-shaped cross-sectional profile (12) which is open towards the outer skin (2) of the vehicle. It has at least one bridge piece (13) with sides (14) pointing towards the outer skin (2), and with flanges (15) joined to the sides (14). The height (H) of the cross-sectional profile (12), commencing from the mid span plane (MQE), diminishes continuously towards the broadened ends (16) of the impact absorber according to a uniform or non-uniform curve (18).
