An ultrasonic probe including an ultrasonic transducer, an electrode extraction layer, and a low acoustic impedance matching layer. The ultrasonic transducer includes a plurality of elements arranged with predetermined spacing. The electrode extraction layer is electrically connected to the ultrasonic transducer. The low acoustic impedance matching layer is provided on the electrode extraction layer, having lower acoustic impedance than the ultrasonic transducer, wherein a plurality of grooves are shaped on the surface of the electrode extraction layer side in parallel to the element array direction. The ultrasonic probe prevents resolving power deterioration in ultrasonic images that may further extract electrodes of an ultrasonic transducer with high reliability.
