To obtain a decorative sheet not accompanied by a corrosive hydrochloric gas, etc., on combusting it, excellent in bend-processing property, overlay- processing property such as a wrapping process, etc., and V-cut-processing property and also having a flame retardant property.

This decorative sheet is obtained by using a sheet consisting of a composition obtained by adding a flame retardant to a propylene-based block copolymer (X) consisting of (A) a propylene-α-olefin random copolymer component with (B) a propylene-α-olefin random copolymer component having a different α-olefin content from the above random copolymer component (A), in which both of a ratio of intrinsic viscosities of the above propylene-α-olefin random copolymer (B) to the copolymer (A), and a product of the above ratio and a weight ratio of both of the random copolymers are within a certain ranges.