Manufacturing errors are suppressed, and the positioning accuracy between the image sensor and the objective lens is improved. An objective lens unit frame (2) that holds an objective lens, and an image sensor holding frame (3) that fits into the objective lens unit frame and holds an image sensor, the objective lens unit frame and the image sensor The holding frame is bonded and fixed by the thermosetting resin (12) applied to these fitting portions, and is positioned outside when the objective lens unit frame and the imaging element holding frame are fitted. An endoscope imaging unit in which an outer surface of the fitting portion and an outer surface other than the fitting portion satisfy the following conditional expression among the outer surfaces of the frame. α / β>; 2 (1) where α is the infrared absorption rate per unit area of the outer surface of the fitting portion, and β is the infrared absorption rate per unit area of the outer surface other than the fitting portion. is there.製造誤差を抑制し、撮像素子と対物レンズとの位置決め精度を向上させる。対物レンズを保持する対物レンズユニット枠(2)と、該対物レンズユニット枠に嵌合し、撮像素子を保持する撮像素子保持枠(3)と、を備え、前記対物レンズユニット枠と前記撮像素子保持枠とが、これらの嵌合部に塗布された熱硬化性樹脂(12)により接着されて固定され、前記対物レンズユニット枠と前記撮像素子保持枠とが嵌合した際に外側に位置する枠の外表面のうち、前記嵌合部の外表面と前記嵌合部以外の外表面とが下記の条件式を満たす内視鏡用撮像ユニット。 α/β>2 …(1) 但し、αは前記嵌合部の外表面の単位面積当たりの赤外線吸収率であり、βは前記嵌合部以外の外表面の単位面積当たりの赤外線吸収率である。