A solid state image sensor including a pixel region having a plurality of pixels includes 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 {TAIL ~ a well region} in which {HEAD ~ the amplifying portion} is arranged 
in is arranged
A solid state image sensor including a pixel region having a plurality of pixels includes 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 { TAIL ~ a well region } in which { HEAD ~ the amplifying portion } is arranged
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