To provide a crosslinking foamed product good in crosslinking property, excellent in surface appearance of a foamed product and capable of weight saving, by using a propylene polymer composition.

A crosslinked product is obtained from a composition containing a propylene copolymer (A) containing a constitutional unit derived from propylene [i] of 50 to 95 mol%, a constitutional unit derived from α-olefin having 2 to 10 carbon atoms excluding propylene [ii] of 4.9 to 49.9 mol% and a constitutional unit derived from a non-conjugated polyene [iii] of 0.1 to 10 mol% (total of constitutional units [i], [ii] and [iii] is 100 mol%), and satisfying specific requirements (a) and (c), and a thermoplastic resin (B).