Ultrasonic probe and ultrasonic instrument

The utility model discloses an ultrasonic probe and an ultrasonic instrument, the ultrasonic probe comprises an acoustic stack, the acoustic stack comprises a piezoelectric layer capable of generating heat and a back lining in heat conduction connection with the piezoelectric layer, and the back lining is a heat conduction back lining; the shell is provided with a cavity, and at least part of the structure of the acoustic stack is located in the cavity; a heat conduction layer is arranged on the inner wall of the cavity and is made of a non-metal heat conduction material; the internal heat dissipation piece is arranged in the cavity, and the internal heat dissipation piece is made of a heat conduction material; the first heat conduction part is arranged in the cavity and is positioned between the acoustic stack and the heat conduction layer; the second heat conduction part is arranged in the cavity and is positioned between the acoustic stack and the internal heat dissipation piece; wherein the acoustic stack