PURPOSE: To enable a metallic fixing sleeve and FRP tensioning material together to be joined strongly at a low cost, by a method wherein the metallic fixing sleeve and FRP tensioning material are stuck and joined together with an adhesive agent layer and the sleeve and FRP tensioning material joined together are press-contacted and joined together through compression of the sleeve.

CONSTITUTION: An end part of an FRP tensioning material 2 is inserted into a cylindrical metallic sleeve 1 and an adhesive agent layer 3 is cast and filled into a space between the whole of an inner circumferential surface of the sleeve 1 and a circumferential surface of the FRP tensioning material 2. After the sleeve 1 and FRP tensioning material 2 are stuck and joined together through curing of the adhesive agent layer 3, the sleeve 1 is compressed so that the diameter of the sleeve 1 is contracted extending over its whole length and the sleeve 1 and FRP tensioning material 2 are brought into press-contact through the adhesive agent layer 3. In the case where the sleeve 1 is compressed, the sleeve 1 is compressed so that the outside diameter (d) of the sleeve 1, amount of elongation of the sleeve 1 and Vickers hardness of the sleeve 1 after the press contact becomes respectively 93-99% of the outside diameter of the sleeve 1 before compression, 15% or less and a range of 100-200Hv.