A strain relief apparatus (100) of a probe and a method of manufacturing the same are disclosed. The strain relief apparatus (100) includes an insert part (110) mounted on a probe switch box (10) and having an insertion recess (112) at an inner side thereof, a ferrite core (120) mounted on the insertion recess (112), and a rubber part (130) provided to the insert part (110) by injection molding. The strain relief apparatus (100) protects a cable of an ultrasonic diagnostic apparatus from impact exerted on the cable and suppresses influence on a contact point between the probe switch box and the cable by bending of the cable, thereby preventing damage of the cable.