An endoscopic image pickup unit includes: a first fixed lens frame which holds a first objective lens group a second fixed lens frame which, being fitted over the first fixed lens frame, holds a second objective lens group a movable lens frame which, being installed in the second fixed lens frame so as to be able to move forward and backward along a photographic optical axis, holds a movable lens and a deformation preventing member which, being interposed between a distal end body and the second fixed lens frame, prevents the second fixed lens frame from being deformed by fixing force of the fixing member when the endoscopic image pickup unit is fixed to the distal end body.
