Positioning precision between an image-acquisition device and an objective lens is enhanced by suppressing manufacturing errors. Provided is an endoscope image-acquisition unit equipped with an objective-lens-unit frame that holds an objective lens and an image-acquisition-device holding frame that is fitted to the objective-lens-unit frame and that holds an image-acquisition device, wherein the objective-lens-unit frame and the image-acquisition-device holding frame are attached and secured to each other by means of thermosetting resin that is applied to fitting portions therebetween and in which polar-molecule materials are mixed, and one of the objective-lens-unit frame and the image-acquisition-device holding frame, whichever one is positioned outside at the fitting portions, is formed of a material that allows microwaves to pass therethrough.
