1. A piezoelectric transformer comprising a piezoelectric member, an input electrode, an output electrode, and a ground electrode, the electrodes being printed on the piezoelectric member, further comprising: a plurality of node point recognition patterns extending radially about the center of each of the input, output, and ground electrodes while being spaced apart from the center of the electrode by a desired radial distance, each of the node point recognition patterns being formed by removing a portion of the electrode corresponding to the node point recognition pattern.