A vehicle consists of many parts assembled, joining method between different materials such as CFRTP and Metal sheets should be considered. The conventional joining methods between different kinds of materials are chemical joining by adhesives and mechanical joining by bolts or rivets. However, those joining method has a few problems as follows. In the case of adhesive, joining strength depends on the strength of matrix polymer because carbon fibers are not involved at interface. In case of the bolts and rivets, stress concentration occurs by tighten up a screw and fiber break occurs by a hole drilled for rivets. Furthermore, it cause that the product weight increases by using fastening parts. In this study, we focus on processability of Carbon Fiber Reinforced Thermo-Plastics and mechanical joining method between CFRTP and metal sheets by using high frequency induction heating was proposed. On a metal sheet several anchors about 1mm high were shaped and they were pressed to be stuck into the surface of CFRTP sheet heated by induction heating. It can be say that this joining method is lightweight and low environmental impact because it does not need additive things. Furthermore, it is suitable for recycle because each joining part can be perfectly disassembled by heating again. In this paper, heating conditions of CFRTP by induction heating were investigated to join aluminum sheet. Afterwards, we clarified the influence of heating and molding condition on joining strength. As a result, in the case of 5-layer stacked CFRTP sheet and A5052 aluminum sheet, the joining strength reached to about 30 MPa which value is as same as that of adhesive method. Then, the mechanism for joining strength of this method was discussed, and optimum anchors layout could be defined. After FEM analysis, the joining strength and break mode could be predicted. It indicated that if high-tensile strength steel of 500 MPa could be used, the joining strength became higher than 50 MPa.