The manufacturing process of Carbon fiber reinforced thermoplastic (CFRTP) composite structures is manufactured at high temperature and high pressure using a commercial mold, and then an intergraded molding is undesirable for large-sized structures with complex shape. Therefore, a joining process is necessary for manufacturing of CFRTP composite structures. CFRTP is able to fusion joining using thermal properties. This study aims to reveal the induction welding behavior of CFRTP composites by high-frequency induction heating method. The material used is woven-CF/PPS laminate. The double D type coil was used was for induction heating. The effects of high-frequency power and pressure of pressure roller the influence in induction welding were investigated. The experimental results revealed the temperature change of the joining part at the time of induction welding of woven-CF/PPS laminates. And, As a result of cross-sectional observation, edge effects were confirmed. Also, the surface roughness, the laminate thickness and the single rap shear strength was decreased with increasing the pressure of pressure roller.