A CFRP-integrated stainless steel complex used for a hydrogen containing tank, a food processing machine, a medical device, a general-purpose machine, and other machines can be designed as a further rational design product with a smaller weight. It has been found that a stainless steel material (22) having particular ultra-micro convex/concave shapes exhibits an excellent adhesive force in combination with an epoxy resin adhesive agent. By using the technique, a stainless steel thick plate piece (22) is used as a cover material in combination with a CFRP (21) to obtain a stainless steel complex (20). This can be assembled with other metal member by tightening bolts. Moreover, by using the excellent adhesive force, it is possible to easily create a structure member having a main portion of CFRP (21) and an end portion of metal. This can be easily assembled with and disassembled from other part by using bolts/nuts and screws.