There is provided a solid-state imaging device in which a plurality of pixels is two-dimensionally arranged in a pixel region. Each of the pixels is formed in an island-shaped semiconductor. In this island-shaped semiconductor, a signal line N+ region and a P region are formed from the bottom. On an upper side surface of this P region, an N region and a P+ region are formed from an inner side of the island-shaped semiconductor. Above the P region, a P+ region is formed. By setting the P+ region and the P+ region to have a low-level voltage and setting the signal line N+ region to have a high-level voltage that is higher than the low-level voltage, signal charges accumulated in the N region are discharged to the signal line N+ region via the P region.