comprises a body 80 and a plurality of cassettes 81 which stand uprightly on the body 80 and a pusher 82 which moves in the direction 82a a number of resonators 2 5 of the same type are stacked in each of the cassettes 81 first resonators 2 5 come down from lower ends of the cassettes 81 in front of the pusher 82 and then are pushed forwardly one by one by the pusher 82 to the forward end of the body 80 next the resonators 2 5 are sucked by a vacuum suction member 43 so as to be upwardly rotated about an axis 83a by about 90 degrees thereafter the resonators 2 5 are chucked by the chuck hand 75 and carried into the assembly jig 62 when the cassettes 81 are vacated they can be easily exchanged by new ones as shown in fig1 and 18 the assembly jig 32 is provided with a base 90 having a cavity 91 for receiving parts and a presser 92 which is movable in a horizontal direction 92b is arranged on one end of the cavity 91 the depth of the cavity 91 is set to be longer than half of the heights of the resonators 2 5 and the terminals 6 10 and shorter than the heights thereof so that these.