A mat having a driving assistance device is provided to improve convenience by minimizing a movement range of a foot of an occupant for working an acceleration pedal and a brake pedal. A mat having a driving assistance device comprises: a flooring material(10) laid on a bottom(2) of a driver seat; a base(20) installed on the flooring material to be near between an acceleration pedal(4) and a brake pedal(6); and a heel seating pad(30) installed on the base unit and putting the heel of the occupant thereon. The heel seat pad is pivoted on the bearing on the base unit and can be rotated.
