This resin composition contains a vinylidene fluoride resin and a (meth)acrylic resin, and satisfies all of [I] to [III]. [I] The resin composition contains 15-60 parts by weight of the (meth)acrylicresin and 40-85 parts by weight of the vinylidene fluoride resin per 100 parts by weight of the combined amount of the (meth)acrylic resin and the vinylidene fluoride resin. [II] Defining I0 as the small-angle X-ray scattering intensity at the wave number Q=0.012nm-1 of the molded body and IA as the small-angle X-ray scattering intensity at the wave number Q=0.012nm-1 of the molded body after a 120-hour exposure in an environment of relative humidity 90% at 60 DEG C, I0 and IA satisfy I0 / IA < 2.5. [III] The haze of the molded body measured in accordance with JIS K7136 is less than or equal to 5%.