1. A solid state imaging device comprising: a pixel array unit in which color filters of a plurality of colors are arrayed with four pixels of vertical 2 pixels×horizontal 2 pixels as a same color unit that receives light of the same color, shared pixel transistors that are commonly used by a plurality of pixels are intensively arranged in one predetermined pixel in a unit of sharing, and a color of the color filter of a pixel where the shared pixel transistors are intensively arranged is a predetermined color among the plurality of colors; wherein all of the shared pixel transistors are intensively arranged in only one predetermined pixel out of the commonly used plurality of the pixels, wherein the one predetermined pixel is one of R or B.