A camera module includes a circuit board; a lens electrically connected to the circuit board; a adjusting base disposed on the circuit board and having at least two through-hole disposed adjacent to opposite sides of the lens; at least two fixed posts; at least two adjusting screw respectively passing through the through-holes of the adjusting base so as to be secured in the fixed posts; and at least two springs respectively encircling the adjusting screws, wherein two ends of each spring are positioned against the adjusting base and one of the fixed post respectively.