Drive control device and ultrasonic motor system

The invention provides a drive control device capable of easily promoting miniaturization of an ultrasonic motor element. The drive control device (2) vibrates a vibrating body (4) by applying signals having mutually different phases to a plurality of electrodes provided on a piezoelectric element on the vibrating body (4), the drive control device being provided with: a signal application unit (17) that selectively applies signals to some of the plurality of electrodes; an amplitude detection unit (15) (feedback signal reception unit) that receives a feedback signal from an electrode different from the electrode to which the signal application unit (17) selectively applies the signal among the plurality of electrodes; and a signal condition control unit (16) that, on the basis of the feedback signal, controls the signal condition to which the signal application unit (17) applies. 本发明提供一种能够容易地推进超声波电动机元件的小型化的驱动控制装置。驱动控制装置(2)通过对在振动体(4)上的压电元件设置的多个电极施加彼此不同的相位的信号从而使振动体(4)振动，该驱动控制装置具备：信号施加部(17)，选择性地对多个电极之中的一部分的电极施加