An object of the invention is to provide a pet toilet sheet cover member preventing shifting of a pet toilet sheet and blocking urine on the sheet, and a pet toilet using the same. The cover member (130) mounted on a toilet sheet (120) spread over a floor surface and absorbing excreta from a pet, is provided to have a configuration that first members each having a bottom surface for contact with a floor surface are disposed in a first end region (143) of the bottom section (132), ribs (164) each having a bottom surface (165), at least a portion of the bottom surface being for contact with a top surface of the toilet sheet (120), are provided in a middle region (163), and second members each having a bottom surface for contact with a top surface of the toilet sheet (120) are provided in a second end region (153).
