A camera module includes a supporting seat, a filter, and a lens assembly. The supporting seat defines a window passing through the supporting seat. An annular flange extending from an inner wall of the window towards the central axis of the window. The filter is fixed on the annular flange. The lens assembly is fixed on the supporting seat. The lens assembly includes a lens holder and a lens disposed in the lens holder. A surface of the supporting seat facing the lens assembly is recessed to form at least two receiving slots surrounding the window. A buffer layer is disposed in each of the at least two receiving slots. An orthogonal projection of the lens on a plane of the buffer layer at least partially overlaps with the buffer layer, and lens is spaced apart from the filter.