To provide such a coating technique as not causing a separation between an intermediate coating film and a top coating film, in an automotive body inner plate-coating process for forming the top coating film on the cured and dried intermediate coating film.

This intermediate coating composition for automotive inner plate portions contains a pigment having an oil absorption (according to JIS K5101) of ≥40 mL/100g and an average particle diameter (D50 measured with a laser diffraction type particle size measurer) of ≤30 μm and stopping the migration of sealing material-originated free components into the surface of the intermediate coating film, in an amount of 2 to 20 mass% based on all pigments and in an amount of 2.0 to 5.0 mass% based on the solid content of the coating.