An actuator device (10) is provided with: a piston (21), which is housed in an internal space, and which forms, with a cylinder (20), a pair of pressure chambers (24, 25), said piston relatively moving with respect to the cylinder； a first actuator (30) connected to one of the pair of pressure chambers； a second actuator (40) connected to the other one of the pair of pressure chambers； a position detector (22) that detects the position of the piston with respect to the cylinder； a pressure detector (23) that detects pressure in one pressure chamber out of the pair of pressure chambers； and a controller (50) that controls the first actuator and the second actuator. The controller is configured so as to control one of the first actuator and the second actuator so that the position detected by the position detector is close to a target position, and to control the other one of the first actuator and the second actuator so that the pressure detected by the pressure detector is close to target pressure.本發明提供一種能以高精度進行定位之致動器裝置。致動器裝置10，具備：活塞21，收容於該內部空間，與缸體20一起形成一對壓力室24、25，且相對於缸體進行相對移動；第1致動器30，與一對壓力室之一方連接；第2致動器40，與一對壓力室之另一方連接；位置檢測器22，檢測活塞相對於缸體之位置；壓力檢測器23，檢測一對壓力室之任一方之壓力室中的壓力；及控制器50，控制第1致動器及第2致動器；控制器，控制第1致動器與第2致動器之一方以使位置檢測器檢測出之位置接近目標位置，控制第1致動器與第2致動器之另一方以使壓力檢測器檢測出之壓力接近目標壓力。
