To provide a repairing joint and a repairing method quickly and surely repairing a damaged part of a flexible tube.

This repairing joint for the flexible tube is so constituted that a cylinder joint body 1a is diametrically divided into two to be formed into a pair of joint half bodies 2, 2A clamping the flexible tube (t), at least, two lock projections 5 to be fitted in recessed beams t2 of the flexible tube (t) are formed in the internal circumferential face of the joint half bodies 2, 2A at some intervals in the axial direction of the joint, the divided faces of a pair of the joint half bodies 2, 2A are mated together, and a connecting means 3 for connecting the joint half bodies 2, 2A is provided. The damaged part is cut and removed, the divided flexible tube (t) is clamped by a pair of the joint half bodies 2, 2A with each lock projection 5 fitted in the recessed beam t2 of the flexible tube (t), and the joint half bodies are connected by the connecting means 3.