An optical member driving mechanism is provided, including a movable portion, a fixed portion, a first driving assembly, and a first intermediate assembly. The movable portion is configured to connect an optical member, and is movable relative to the fixed portion. The first driving assembly is configured to provide a first driving force to move the movable portion relative to the fixed portion. When the first driving assembly drives the movable portion to move relative to the fixed portion, the movable portion moves relative to the fixed portion via the first intermediate assembly.