To provide a driving device including a piezoelectric element deterioration detection circuit and a deterioration detection method that enable detection of deterioration of the piezoelectric element used in the driving device, without stopping a normal operation of the driving device. The driving device 1 includes a piezoelectric element 2, a power supply unit 3, a first resistor 11, a second resistor 12, a measuring unit and a control unit, wherein resistance values of the first resistor and the second resistor are smaller than an insulating resistance value of the piezoelectric element, the measuring unit measures, a voltage across the first resistor (voltage between a first terminal 13 and a second terminal 14), in a state of supplying a predetermined voltage from the power supply unit, and the control unit 3 calculates a resistance value of the piezoelectric element from a voltage value obtained by the measurement of the measuring unit, and determines, whether or not degradation has occurred in the piezoelectric element based on the calculated resistance value.