A lens barrel includes first and second tubes, a base, a single motor, and a drive gear for transmitting a drive force of the motor to the first and second tubes. The drive gear includes a cylindrical gear and a shaft gear having a shaft inserted in the cylindrical gear. The cylindrical gear and the shaft gear rotate about a common rotation axis. The cylindrical gear is interposed between a first feed screw and the motor, and the shaft gear is interposed between a second feed screw and the motor. Accordingly, zooming and focusing can be made by one motor, increasing density and integration and providing excellent space efficiency.