PURPOSE: To eliminate various restrictions caused by existence of a joint and to satisfactory accomplish jointing work at a job site without any special complication by reinforcing a joint part to make it a joint structure capable of preventing to its utmost, the problem of check and damage easily taking place on the joint part of concrete made members.

CONSTITUTION: In the case of the reinforcing structure of the joint part of a concrete made member for jointing both concrete made members 1, 2, which are to be jointed together through joints 5a protruding beyond the respective joint end surfaces 1b, 2b, a fiber reinforcement material containing cement reinforcement panel 10, which is placed across both concrete made members, is affixed to the surface near the joint end faces of both concrete made members 1, 2. This reinforce panel 10 is bolted to both concrete made members 1, 2.