PROBLEM TO BE SOLVED: To reliably prevent a cable tip from touching an inner wall of a hole and being damaged by using a simple structure.SOLUTION: An inside-hole inspection device includes: an industrial endoscope E that takes in images from a camera 3 provided at its tip, includes a cable 2 for image communication to communicate the taken-in images to a base end direction, and can change a visual field direction of taking in images when a tip 21 is bent by a prescribed amount in a prescribed direction with an operation tool 1 provided at the base end of the cable 2 and a spherical guide member 4 having a smooth outer peripheral surface provided at an outer periphery of the camera 3 at the tip 21 of the cable 2.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】ケーブル先端が空孔の内壁に触れて損傷するのを簡易な構造で確実に防止する。【解決手段】先端に設けたカメラ3から画像を取り込み、取り込んだ画像を基端方向へ伝達する画像伝達用のケーブル2を有し、当該ケーブル2の基端に設けられた操作具1によって先端部21が所定方向へ所定量屈曲させられて画像取り込みの視野方向が変更可能な工業用内視鏡Eと、ケーブル2の先端部21の、カメラ3の外周に設けられた円滑な外周面を有する球体のガイド部材4とを備える。【選択図】図1