The endoscope image pickup apparatus 10 includes an image pickup optical system 20, a rectangular prism 30 on which light from the image pickup optical system 20 enters, the right angle prism 30 is adhered to a first main surface 60 SA, And an image pickup substrate 60 having a rectangular shape in a plan view having a thickness of 20 m or more and 100 m or less, in which the light receiving portion 61 is formed under the prism 30, and a groove 60 T is formed in the second main surface 60 SB of the image pick-And the direction of the groove 60T is inclined by more than 45 degrees with respect to the minor axis direction.内視鏡用撮像装置１０は、撮像光学系２０と、前記撮像光学系２０からの光が入射する直角プリズム３０と、前記直角プリズム３０が第１の主面６０ＳＡに接着されており、前記直角プリズム３０の下に受光部６１が形成されている、厚さが２０μm以上１００μm以下の平面視長方形の撮像基板６０と、を具備し、前記撮像基板６０の第２の主面６０ＳＢに溝６０Ｔが形成されており、前記溝６０Ｔの方向が短軸方向に対して４５度超傾斜している。
