Resin composition and molded body of same

A foam-molded body, comprising a resin composition comprising a polycarbonate resin having at least a structural unit derived from a dihydroxy compound represented by formula (1):

• wherein, in the structural unit derived from the dihydroxy compound represented by formula (1), the hydroxyl oxygens of formula (1) are present as oxygens contained in carbonate groups of the polycarbonate resin,
• and wherein:
• an average diameter of bubbles in said foam-molded body is 100 μm or less;
• a strain-hardening factor of uniaxial extensional viscosity of said resin composition is from 0.1 to 5;
• the polycarbonate resin further comprises a structural unit derived from a compound comprising three or more hydroxy groups, said compound comprising three or more hydroxyl groups being contained in a ratio of 0.2 to 2 mol % based on structural units derived from all dihydroxy-containing compounds contained in the polycarbonate resin;
• or
• the resin composition further comprises a compound having two or more functional groups selected from the group consisting of a carbodiimide, an isocyanate, an epoxy, a silane, an acid anhydride, an oxazoline, and a mixture thereof.