To provide a connecting apparatus of pipes by caulking by beading which is utilized in a pipe other than a straight pipe so that the outline shape in portions other than a connecting part is a curved pipe or the like and also automated by a simple mechanism without requiring a wide space.

This apparatus is provided with a robot arm 21 with which a beading means 1 by which the superposed part 5 of both pipes 3, 4 fixed by fixing means is annually beaded from the outer periphery is reciprocatively rotationally driven at a prescribed angle around both pipes 3, 4. The beading means 1 is constituted of an approximately J-shaped frame 11, a moving body 12 which is movable back and forth along the side of the inside of a straight part 11b of the frame 11, a moving means 13 for moving the moving body 12 back and forth and grooving rollers 14 for beading which are respectively provided in two places on the side of a lower end circular arc part 11c and one place on the side of the moving body 12 on the opposite surfaces of the moving body 12 and the lower end circular arc part 11c of the frame 11.