Ultrasonic energy is spotlighted as a skill which connects detailed parts accurately and safely. So we designed the horn needed for attaching Tubular type of metal parts such as slip ring used for providing electricity for a body of rotation. We considered mainly booster’s size, slip-ring’s size, and nature frequency of horn. This design fixed the frequency given from ultrasonic metal welder as 40,000Hz, so it decided the approximate length of horn which makes maximum vibration amplitude through formula. And we designed the horn as a step shape with fillet for increasing the amplitude and decreasing stress concentration. Horn’s tip is designed 10mm length in view of the shape of slip-rings. And we calculated and analyzed the natural frequency by the modal analysis and harmonic analysis using Ansys that is analysis program. Through this study, we could examine the manufacturing possibility of the horn for ultrasonic metal welding of tubular type.