PURPOSE: To enhance the performance and at the same time to facilitate an electrical connection for the titled loudspeaker, by forming a nonlinear lead pattern of a diaphragm made of a composite plate of a metallic plate and a plastic plate and shifting the angle at the joint between the center metallic plate and an external circuit.

CONSTITUTION: A diaphragm is made of a composite plate of the metallic and plastic plates with almost a circular form and has a projected part 4 for connection to another circuit. The center of the diaphragm forms a center rigid body part 2 leaving the metallic plate as it is, and a voice coil 3 is stuck at the part 2. The metallic plate is excluded at the circumference part of the part 2 to form an edge part 1. Then the lead patterns 6a and 6b of the metallic plate are provided to take out the lead from the part 2 toward the part 4. At the same time, the dummy patterns 7a and 7b are provided under a shifted angle. Since the pattern is provided in an arc form and accordingly is bent easily, and furthermore an even flexion vibration is obtained in the circumference direction owing to the dummy pattern.