A camera module with reduced light leakage includes a printed circuit board and a mounting bracket mounted on the printed circuit board. The printed circuit board includes a first surface and at least one side surface perpendicularly connected to the first surface. A step is defined at the printed circuit board. The step passes through the first surface and at least one side surface. A flange is defined on the mounting bracket. The flange is received and fixed in the step and this structure places less reliance on the strength and opacity of the particular adhesive used.