An ultrasound probe is provided which maintains sufficient adhesion strength of the layers that configure the ultrasound probe and which matches the acoustic impedance of a piezoelectric element to that of the organism； also provided is an ultrasound diagnostic device provided with said ultrasound probe. This ultrasound probe (100a) is characterized by comprising a backing layer, a piezoelectric element layer (6E), an acoustic matching layer (2A) and an acoustic lens (1), laminated in that order, wherein an adhesion layer (14A) containing vanadium glass is provided between the piezoelectric element layer (6E) and the acoustic matching layer (2A).
