An image pickup unit for an endoscope, the image pickup unit comprising: an objective optical system member; an image pickup device having a rectangular shape, wherein the image pickup device includes, in a pixel forming region in which a plurality of pixels are disposed, an effective pixel region, a video display region provided in the effective pixel region, and a phase reference pixel region in which a pixel that outputs a signal capable of being used for phase adjustment of the video by receiving light is disposed, the phase reference pixel region being provided outside the video display region, the image pickup device further including a plurality of metal pads provided along one side of the rectangular shape on a surface having the pixel forming region; and a transmission cable, the image pickup unit for endoscope being configured to be connectable, through the transmission cable, to a camera control unit which generates a video based on a signal outputted from the image pickup device, wherein the phase reference pixel region is disposed at a position closer to the plurality of metal pads than to a center of the effective pixel region, wherein the objective optical system member is configured such that an image is formed in an image circle on a light-receiving surface of the image pickup device, light transmitted through the objective optical system member is emitted in a transmitted light reaching region including the image circle and having a range wider than the image circle on the light-receiving surface, and an intersection point at which an optical axis that passes through a center of a lens included in the objective optical system member intersects with the effective pixel region is arranged shifted to a position on a side where the metal pads are formed from a center of the effective pixel region, and wherein the phase reference pixel region is disposed inside the transmitted light reaching region and outside the image circle. an objective optical system member; an image pickup device having a rectangular shape, wherein the image pickup device includes, in a pixel forming region in which a plurality of pixels are disposed, an effective pixel region, a video display region provided in the effective pixel region, and a phase reference pixel region in which a pixel that outputs a signal capable of being used for phase adjustment of the video by receiving light is disposed, the phase reference pixel region being provided outside the video display region, the image pickup device further including a plurality of metal pads provided along one side of the rectangular shape on a surface having the pixel forming region; and a transmission cable, the image pickup unit for endoscope being configured to be connectable, through the transmission cable, to a camera control unit which generates a video based on a signal outputted from the image pickup device, wherein the phase reference pixel region is disposed at a position closer to the plurality of metal pads than to a center of the effective pixel region, wherein the objective optical system member is configured such that an image is formed in an image circle on a light-receiving surface of the image pickup device, light transmitted through the objective optical system member is emitted in a transmitted light reaching region including the image circle and having a range wider than the image circle on the light-receiving surface, and an intersection point at which an optical axis that passes through a center of a lens included in the objective optical system member intersects with the effective pixel region is arranged shifted to a position on a side where the metal pads are formed from a center of the effective pixel region, and wherein the phase reference pixel region is disposed inside the transmitted light reaching region and outside the image circle.