Disclosed is a chair footrest frame, comprising a base sliding block (1) fixed to both sides of a bottom face of a chair base, sliding rods (2) arranged in a sliding manner respectively on the base sliding blocks (1), a footrest cushion (7) provided between the two sliding rods (2), and a roller ball (12) suitable for the sliding of the sliding rods (2) being provided on the base sliding block (1). The frictional force between the sliding rods and the base sliding block is relatively small, abrasive wear is relatively low, and operation is simple and convenient, which benefit improvement of the functionality and service life of the footrest frame.