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An ultrasonic welding apparatus 1 includes an anvil equipped with a terminal clamp 3 for disposing an electrical contact part 31 connected to an electronic device and a core wire weld part 32 which ranges to the electrical contact part 31 and stacks a core wire 21 constructed by bundling plural stra

An ultrasonic welding apparatus 1 includes an anvil equipped with a terminal clamp 3 for disposing an electrical contact part 31 connected to an electronic device and a core wire weld part 32 which ranges to the electrical contact part 31 and stacks a core wire 21 constructed by bundling plural strands, and a chip 7 which is disposed in a position opposed to the anvil and mutually welds the core wire to the terminal clamp by applying ultrasonic vibration in a state of pinching the core wire 21 and the terminal clamp 3 between the anvil and the chip and pressurizing the core wire and the terminal clamp in a direction of approaching each other. The ultrasonic welding apparatus 1 includes a core wire protrusion prevention wall 5 which is disposed in a position close to a terminal of the core wire 21 and prevents the terminal of the core wire 21 from moving to a place overlapping with the electrical contact part 31.

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1. An ultrasonic welding method comprising: providing an anvil with a terminal clamp comprising an electrical contact part including a pair of opposed edges and connected to an electronic device,stacking a core wire constructed by bundling plural strands on a core wire weld part extending from the e

1. An ultrasonic welding method comprising: providing an anvil with a terminal clamp comprising an electrical contact part including a pair of opposed edges and connected to an electronic device,stacking a core wire constructed by bundling plural strands on a core wire weld part extending from the electrical contact part, andmutually welding the core wire to the core wire weld part by applying ultrasonic vibration in a state of pinching the core wire and the core wire weld part between the anvil and the chip and pressurizing the core wire and the core wire weld part in a direction of approaching each other,wherein in the stacking step, a terminal of the core wire is arranged in a position close to a core wire protrusion prevention wall comprising a pair of opposed edges which extend outwardly beyond the pair of opposed edges of the electrical contact part to prevent the terminal of said core wire from moving to a place overlapping with the electrical contact part.