Vehicle-body lower face structure

A vehicle-body lower face structure, comprising:

• a torsion beam type of rear suspension comprising a pair of right-and-left trailing arms and a torsion beam connecting the trailing arms;
• a floor under cover for airflow straightening attached to a portion of a vehicle body in front of the rear suspension so as to cover a vehicle-body lower face;
• an arm cover for airflow straightening attached to a lower portion of each of the trailing arms of the rear suspension so as to cover a lower face of the trailing arm,
• wherein said arm cover comprises a main part and a front part which is provided in front of the main part, and the main part and the front part of the arm cover are configured such that when said rear suspension takes a standard vehicle-weight position, both of the main part and the front part are respectively inclined rearwardly and downwardly, wherein an angle of inclination of said rearwardly-and-downwardly inclined front part is smaller than an angle of inclination of said rearwardly-and-downwardly inclined main part of the arm cover.