Drive device

The invention provides a driving device which is provided with a plate spring for pressing a lead screw, and the storage performance of the driving device and the fixing performance of the plate spring are improved. A drive device (1) is provided with: a frame (2) having a first wall (2b) and a second wall (2c) facing each other; a drive unit (3) provided on the first wall side of the frame; a lead screw (4) that rotates by the driving force of the driving unit; a bearing (8), at least a part of which is provided on an opposing surface (2e) of the second wall opposing the first wall, and which rotatably supports the screw (4); a movable member (6) that moves along the lead screw (4) by the driving force of the driving unit; and a plate spring (7) having a fixed portion (7a) and a biasing portion (7b), the plate spring being configured such that the fixed portion is sandwiched between the second wall (2c) and at least a part of the bearing (8) and fixed to the second wall (2c), and the biasing portion presses