An optical unit may include a movable body holding an optical element; a fixed body surrounding the movable body; a plate-shaped spring member with a fixed body side connection part, a movable body side connection part, and an arm part which connects the fixed body side connection part with the movable body side connection part; and a drive mechanism to displace the movable body. The cover may be provided with a side plate part. The fixed body side connection part may include a frame part; and a plurality of protruded parts protruded from the frame part. The protruded parts may be separately provided from each other for every welding portion and an entire tip end side of the protruded part is formed as a melted part by welding.