An ultrasonic probe having a combination of plural types of functions and thereby easy to carry. The ultrasonic probe includes: a housing part for housing a first group of ultrasonic transducers and a second group of ultrasonic transducers in a first edge part and a second edge part having different curvatures from each other, respectively, the first and second groups of ultrasonic transducers transmitting ultrasonic waves according to drive signals and receiving ultrasonic echoes to output reception signals; and a grip part rotatable relative to the housing part.