An ultrasound diagnosis apparatus configured to generate image data based on reception signals acquired through ultrasound transmissions to and ultrasound receptions from an object, the ultrasound diagnosis apparatus comprising: an ultrasound probe including a plurality of transducers arranged along at least a first direction; a transducer selection unit configured to select transmitting transducer groups and a receiving transducer group from the plurality of transducers, wherein at least a first transmitting transducer group and a second transmitting transducer group are selected corresponding to the selected receiving transducer group, and transmission ultrasound waves emitted from the first transmitting transducer group and the second transmitting transducer group are focused at different transmission focusing points of a first transmitting focus point (Ftl) and a second transmitting focus point, respectively; a transmission unit configured to drive each of the first transmitting transducer group and the second transmitting transducer group; a receiving phase compensation/summation unit configured to correct the reception signals received by each transducer by using receiving delays occurred due to differences of propagation distances from an observing point (Px) in the object to each of the transducers forming the selected receiving transducer group, and add and compound the corrected reception signals, thereby forming a first reception signal received from ultrasounds focused at the first transmitting focus point (Ftl) and reflected at the observing point (Px), and forming a second reception signal received from ultrasounds focused at the second transmitting focus point and reflected at the observing point (Px); a wave-front delay correction circuit configured to correct each of the first reception signal and the second reception signal by using transmission delays occurred due to differences between a propagation distance from the first transmission focus point (Ftl) to the observing point (Px) and a propagation distance from the second transmission focus point to the observing point (Px), respectively; an accumulation unit configured to add the corrected first reception signal and the corrected second reception signal, thereby forming a third reception signal corresponding to the observing point (Px); a scanning control unit configured to control ultrasound scans performed on a plurality of the observing points by successively shifting the receiving transducer group and the first transmitting transducer group and the second transmitting transducer group along the at least first direction; and an image processing unit configured to generate ultrasound image data based on the third reception signals corresponding to each of the observing points (Px) acquired through the ultrasound scans. an ultrasound probe including a plurality of transducers arranged along at least a first direction; a transducer selection unit configured to select transmitting transducer groups and a receiving transducer group from the plurality of transducers, wherein at least a first transmitting transducer group and a second transmitting transducer group are selected corresponding to the selected receiving transducer group, and transmission ultrasound waves emitted from the first transmitting transducer group and the second transmitting transducer group are focused at different transmission focusing points of a first transmitting focus point (Ftl) and a second transmitting focus point, respectively; a transmission unit configured to drive each of the first transmitting transducer group and the second transmitting transducer group; a receiving phase compensation/summation unit configured to correct the reception signals received by each transducer by using receiving delays occurred due to differences of propagation distances from an observing point (Px) in the object to each of the transducers forming the selected receiving transducer group, and add and compound the corrected reception signals, thereby forming a first reception signal received from ultrasounds focused at the first transmitting focus point (Ftl) and reflected at the observing point (Px), and forming a second reception signal received from ultrasounds focused at the second transmitting focus point and reflected at the observing point (Px); a wave-front delay correction circuit configured to correct each of the first reception signal and the second reception signal by using transmission delays occurred due to differences between a propagation distance from the first transmission focus point (Ftl) to the observing point (Px) and a propagation distance from the second transmission focus point to the observing point (Px), respectively; an accumulation unit configured to add the corrected first reception signal and the corrected second reception signal, thereby forming a third reception signal corresponding to the observing point (Px); a scanning control unit configured to control ultrasound scans performed on a plurality of the observing points by successively shifting the receiving transducer group and the first transmitting transducer group and the second transmitting transducer group along the at least first direction; and an image processing unit configured to generate ultrasound image data based on the third reception signals corresponding to each of the observing points (Px) acquired through the ultrasound scans.