The present disclosure provides a lens module. The lens module includes a lens barrel with an optical aperture, the lens barrel including an outer wall and an inner wall opposite to the outer wall; at least one lens located in the lens barrel; a shading piece located by an object side or/and an image side of the lens. The shading piece includes an upper surface near the optical aperture, a lower surface away from the optical aperture, an outer ring surface connecting to the upper surface and the lower surface and near the inner wall of the lens barrel, and an inner ring surface connecting to both upper surface and lower surface and opposite to the outer ring surface. The inner ring surface is an arc facing an optical axis of the lens module.