An endoscope front-end structure includes: an imaging module; a frame body that has a through hole and a salient portion, the frame body being configured to hold the imaging module when the imaging module is inserted in the through hole from an insertion opening formed at a proximal end of the frame body; a first adhesive agent that is filled and hardened between a part of outer periphery of a resin seal and a surface of the salient portion; and a second adhesive agent that is filled and hardened in a gap formed between the through hole of the frame body and the imaging module inserted in the through hole.