A piezoelectric/electrostrictive device that includes a base 11 having a pair of right and left movable parts 11a, 11b and a fixing part 11c disposed at one end thereof as well as piezoelectric/electrostrictive elements 12a, 12b disposed on the sides of the movable parts 11a, 11b of the base 11 is fabricated to have a construction with fewer components. The piezoelectric/electrostrictive device having a construction with fewer components is provided by adopting a base 11 having an integral structure formed by bending an original plate stamped into a shape that delineates a plane development of the base, as the base of the piezoelectric/electrostrictive device. In addition, in this piezoelectric/electrostrictive device, piezoelectric/electrostrictive elements are arranged on inner sides of a pair of left and right movable parts. Accordingly, destruction of the piezoelectric/electrostrictive element can hardly occur and high reliability of the piezoelectric/electrostrictive device is achieved.