To provide a spun-bonded non-woven fabric capable of lowering a sealing temperature on the production of a diaper, consequently capable of maintaining the excellent flexibility and touch of sealed portions, and excellent in strength and continuous productivity, and to provide the diaper comprising the spun-bonded non-woven fabric.

This spun-bonded non-woven fabric comprises a resin material containing at least one of propylene-α-olefin random copolymers and satisfying the following conditions (A) to (D). (A) The content of the propylene-α-olefin random copolymer is 2-10 mol.%. (B) The melting peak temperature is ≤150°C. (C) The melt index (230°C, 2.16 kg) is 10-100 g/10 min. (D) The mol. wt. distribution (Mw/Mn) is 2.0-6.0. A diaper uses the spun-bonded non-woven fabric.