A tip tool guide apparatus is brought into a water chamber of a steam generator of nuclear power equipment, and guides a tip tool, such as a shot peening head, along a necessary region. For this purpose, a tip tool guide apparatus 1000 is composed of a swivel support portion 100, a slide table 200, and a manipulator 300. The swivel support portion 100 is self-supported and fixed within the water chamber, and turns the slide table 200 connected thereto. The slide table 200 connects the manipulator 300, and moves the manipulator 300 slidingly in a fore-and-aft direction. The manipulator 300 grasps the tip tool at its leading end. For bringing into the water chamber, the swivel support portion 100, the slide table 200, and the manipulator 300 are separated from each other, brought in individually, and assembled within the water chamber to constitute the tip tool guide apparatus 1000.