Abstract: A flexible ultrasound transducer according to an embodiment of the present disclosure includes a substrate having a central part and a plurality of extended parts extending from the central part; an ultrasound probe disposed at the central part of the substrate to acquire an ultrasound image of a region of interest; and a focused ultrasound output unit disposed at the extended parts of the substrate to output a focused ultrasound to the region of interest, wherein the focused ultrasound output unit disposed at the extended parts of the substrate has a flexible property and is deformable. According to the structure of an embodiment, it is possible to simultaneously achieve ultrasound imaging and ultrasonic therapy such as lesion stimulation or removal through focused ultrasound, and adjust the focal position of focused ultrasound or improve the focal sensitivity through flexible movement.