A surface protective sheet 1 endowed with both a higher re-peelability and higher non-staining properties is provided. The surface protective sheet 1 has a supporting substrate 10 and a pressure-sensitive adhesive layer 20 provided on a front side of the supporting substrate 10. At least a portion of the supporting substrate 10, including the front side 10a, is made of a resin material that is composed primarily of a polyolefin and includes A: at least one of a fatty amide and a fatty acid metal salt, and B: an antioxidant. The content CA of the component A, based on the weight of the resin material, is from 50 ppm to 500 ppm.