The present invention relates to a pressure sensor for measuring the pressures experienced by an anthropomorphic dummy in an abdominal or thoracic section of the trunk of said dummy. This sensor comprises at least two fluid-tight flexible pressure-measurement chambers (4) arranged in the abdominal or thoracic section of the trunk of said dummy on each side of a sagittal median plane of said abdominal or thoracic section, said pressure-measurement chambers (4) being filled with an incompressible fluid and each comprising at least one pressure-measurement cell (5) able at output thereof to deliver an electric signal indicative of the pressure of said fluid in said pressure-measurement chambers.