The present invention relates to an ultrasonic probe for producing a real-time three dimensional live action image (a four dimensional image), which has a long lifetime, and an improved image quality, can prevent malfunction. The ultrasonic probe for producing a four dimensional image includes power transmission means for transmission of power from an upright motor to a module (2) having acoustic elements for swinging the module, the power transmission means includes a first link (20) having a horizontal portion (22) directly connected to a motor shaft, and a sloped portion projected upward from one side end of the horizontal portion at an angle in conformity with a locus of a swing action of the module, and a second link (21) comprising a horizontal (29) having an interlocking connected thereto and a pair of parallel portion (30) and (31) projected upwardly from opposite ends of the horizontal portion, such that the second link is interlocked along the first link in a state of being interposed between the first link and the module, wherein the interlocking shaft (28) is connected with an inclined portion of the first link by a shaft and the pair of parallel portions is mounting to a lower side of the module in a horizontal direction with a shaft.
