Optical device capable of being miniaturized

The invention provides an optical device which can be miniaturized. The optical device includes a lens unit, a driving unit configured to include a base member, a displacement member, and an urging member, a cylinder configured to support the driving unit, and a first coupling portion configured to be coupled with the urging member. A groove along an optical axis direction of the lens unit is provided inside the cylinder. The urging member urges the displacement member with respect to the base member. The first coupling portion and the groove overlap each other when viewed from an optical axis direction. 本发明提供一种能够小型化的光学装置。所述光学装置包括透镜单元，驱动单元被构造为包括基座构件、移位构件和推压构件，圆柱体被构造为支撑所述驱动单元，以及第一耦合部构造为与所述推压构件耦合。沿着所述透镜单元的光轴方向的槽被设置在所述圆柱体内部。所述推压构件相对于所述基座构件推压所述移位构件。从光轴方向观察时所述第一耦合部和所述槽彼此重叠。