To provide a solid-state image pickup device capable of acquiring an excellent photographed video image by suppressing a dark current that appears in the photographed video image as noise, and preventing bedewing by controlling temperature and humidity.
A control unit of a solid-state image pickup device 1 reduces the humidity within the solid-state image pickup device 1 by starting operation of an electric decomposition cell 17 if a luminance level of a picked-up video image becomes a predetermined value or lower, and the humidity within the solid-state image pickup device 1 is detected by a humidity sensor 16A. Thus, if the humidity becomes a predetermined value or lower, Peltier elements 8-10 are started to cool down solid-state imaging devices 5-7.
Tadahiko Inaba
Kanako Murakami
Nakatsuru Kazutaka