A camera module includes an imaging lens module, an axial driving device and an image sensor module. The imaging lens module includes at least one optical imaging lens element. The axial driving device is configured to drive the optical imaging lens element to move in a direction parallel to an optical axis. The image sensor module is disposed on an image side of the axial driving device and includes an image sensor and a substrate. The image sensor is configured to convert light passing through the imaging lens module into an image signal. The axial driving device includes a base, and the base has a first axial assembling structure. The substrate has a second axial assembling structure abutted against the first axial assembling structure, so that the imaging lens module is aligned with the image sensor module in a direction along the optical axis.