Abstract: A retainer for horizontally suspended flexible material, such a headliner of a car, has an elongated support bar and one or more retainer pins engaged within one or more openings formed in the support bar. Each of the retainer pins has an arcuate portion with a sharp end that is adapted to penetrate through the flexible material and move the arcuate portion in a hook-like manner into engagement with the suspended flexible material. The support bar which has been securely engaged with the pins is moved into contact with the outer surface of the flexible material, preventing it from sagging and retaining it in a generally taut position.