{HEAD ~ A solid state image sensor} including a pixel region having a plurality of pixels includes {TAIL ~ at least a photodiode} and an amplifying portion amplifying photocharges outputted from the photodiode in the pixel region, and further includes a well electrode for taking well potential of a well region in which the amplifying portion is arranged 
includes
{ HEAD ~ A solid state image sensor } including a pixel region having a plurality of pixels includes { TAIL ~ at least a photodiode } and an amplifying portion amplifying photocharges outputted from the photodiode in the pixel region , and further includes a well electrode for taking well potential of a well region in which the amplifying portion is arranged
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