PROBLEM TO BE SOLVED: To provide an ultrasound diagnostic apparatus having a plurality of transducer groups with a simple apparatus configuration.SOLUTION: An ultrasound diagnostic apparatus (1) has a plurality of transducer groups which are provided at a distal end portion of a probe, and are configured by a plurality of transducers arranged in a circumferential form or an arc form having a same radius of curvature, and scaning within a surface orthogonal to each other, and a common sound-ray synthesis table storing control data of the respective transducer groups.COPYRIGHT: (C)2009,JPO&INPIT【課題】装置構成が簡単な複数の振動子群を有する超音波診断装置を提供する。【解決手段】本発明の超音波診断装置1は、プロ-ブの先端部に設けられ、同じ曲率半径を有する円周状又は円弧状に配列された複数の振動子から構成され、互いに直交する面内を走査する複数の振動子群と、各振動子群の制御デ-タを記憶する共通の音線合成テ-ブルとを有する。【選択図】図2