To provide a shock absorbing member having excellent shock absorbing performance.

This shock absorbing member 1 made of foaming thermoplastic resin is provided with a basic part 2 like a flat plate and a slit-like rib structure 3 protruding on at least one face 22 of the basic part 2. The slit-like rib structure 2 is composed of combination of a plurality of ribs 32, 34 having different height of two steps or more. When height h1 of the first rib 32 is 100, height h2 of the second rib 34 is 40 or more and less than 80.