A solid-state image pickup device including a layered structure which includes an electric-charge transfer section The photosensors include a first photosensor particularly sensitive to light of a first wavelength and a second photosensor particularly sensitive to light of a second wavelength shorter than the first wavelength. The first photosensor and the second photosensor are adjacently located but separated by a potential barrier section. A read gate located beneath the first photosensor and transports electric charge from the first photosensor to an electric-charge transfer section located beneath the second photosensor.