A laminated piezoelectric element includes plural internal electrodes which are laminated and a dead area at outer regions thereof. The laminated piezoelectric element has first and second end surfaces in an expansion direction thereof. In bonding a first bonded surface of a piezoelectric element fixing portion to the first end surface, a bonding method includes forming a first adhesive accumulation in the first bonded surface, accumulating an adhesive agent in the first adhesive accumulation, and bonding the first end surface to the first bonded surface. In bonding a vibration friction element to the second end surface, the bonding method includes forming, in a second bonded surface of the vibration friction element, a positioning guide hole for guiding the second end surface of the laminated piezoelectric element and a second adhesive accumulation, accumulating the adhesive agent in the second adhesive accumulation, and bonding the second end surface to the vibration friction portion.