Abstract: The present invention relates to an improved lens of a diving mask that includes a plurality of layers of glass and a transparent gluing film combined between the layers of glass, and the gluing film comes with the characteristics of high elasticity and high tenacity, such that the invention not only can improve the shock-resistance of the lens of the diving mask, but also can adhere the broken pieces or particles of glass onto the gluing film to prevent the broke glass from flying over or hurting a diver's eyes or face when the lens is broken accidentally, so as to achieve a safe protection effect.