A camera assembly adapted to be installed in an electronic device, comprising: a camera module; a motor; and a transmission module connected between the camera module and the motor, wherein the motor is configured to drive the transmission module so as to drive the camera module to move; wherein, the transmission module comprises a rotating-shaft group and a gear group; the rotating-shaft group comprises a plurality of rotating shafts connecting the motor and the camera module; the gear group comprises a plurality of gears arranged on the plurality of rotating shafts; the plurality of gears engage with each other; wherein, the plurality of rotating shafts comprise a driving shaft, at least one intermediate shaft and a driven shaft, the driving shaft connects to the motor, and the driven shaft connects to the camera module; the plurality of gears comprise a driving gear, at least one intermediate gear and a driven gear, the driving gear is set on the driving shaft, the at least one intermediate gear is set on the at least one intermediate shaft, and the driven gear is set on the driven shaft; wherein, each of the plurality of rotating shafts includes a first end and a second end arranged oppositely; the first end faces towards the motor, and the second end faces towards the camera module; wherein, a distance from a bottom surface of the second end (233 If) of the driven shaft to a top surface of the driven gear is less than a distance from the bottom surface of the second end of the driven shaft to a top surface of the intermediate gear adjacent to the driven gear, and an empty space is thereby formed above the top surface of the driven gear. a camera module; a motor; and a transmission module connected between the camera module and the motor, wherein the motor is configured to drive the transmission module so as to drive the camera module to move; wherein, the transmission module comprises a rotating-shaft group and a gear group; the rotating-shaft group comprises a plurality of rotating shafts connecting the motor and the camera module; the gear group comprises a plurality of gears arranged on the plurality of rotating shafts; the plurality of gears engage with each other; wherein, the plurality of rotating shafts comprise a driving shaft, at least one intermediate shaft and a driven shaft, the driving shaft connects to the motor, and the driven shaft connects to the camera module; the plurality of gears comprise a driving gear, at least one intermediate gear and a driven gear, the driving gear is set on the driving shaft, the at least one intermediate gear is set on the at least one intermediate shaft, and the driven gear is set on the driven shaft; wherein, each of the plurality of rotating shafts includes a first end and a second end arranged oppositely; the first end faces towards the motor, and the second end faces towards the camera module; wherein, a distance from a bottom surface of the second end (233 If) of the driven shaft to a top surface of the driven gear is less than a distance from the bottom surface of the second end of the driven shaft to a top surface of the intermediate gear adjacent to the driven gear, and an empty space is thereby formed above the top surface of the driven gear.