Laminated body

A laminated body, comprising:

• a porous base material containing a polyolefin-based resin as a main component;
• and a porous layer disposed on at least one surface of the porous base material, the porous layer containing a polyvinylidene fluoride-based resin,
• the porous base material having (i) a phase difference of not more than 80 nm with respect to light with a wavelength of 590 nm in a state where the porous base material is impregnated with ethanol and (ii) a porosity within a range of 30% to 60%,
• the polyvinylidene fluoride-based resin containing crystal form α in an amount of not less than 34 mol % with respect to 100 mol % of a total amount of the crystal form α and crystal form β contained in the polyvinylidene fluoride-based resin,
• wherein the amount of crystal form α is calculated from an absorption intensity at around 765 cm−1 in an IR spectrum of the porous layer, while an amount of crystal form β is calculated from an absorption intensity at around 840 cm−1 in the IR spectrum of the porous layer.