A fireplace cover including a substantially rectangular flat sheet member of slightly greater width and height than the fireplace opening for overlapping and covering the same, a pair of one-piece foot members, each having a vertical leg mouned on the sheet member and fixed to a foot extending front-to-rear beneath and supporting the sheet member.The fireplace cover is further characterized by a substantially U-shaped, anti-torsion, reinforcing member fixed to the rear surface of the sheet member extending substantially parallel to the top and side edges of the sheet member, but spaced uniformly from the corresponding edges to provide sufficient marginal areas to overlap the margins of fireplace openings of different sizes.