Abstract: A diving goggles with defogging device, including a flexible frame provided with an adjustable fastening strap that is used to secure the diving goggles to the face of a user; an exterior lens used to seal off sea water from flowing into the flexible frame is fixed to the extreme exterior of the flexible frame; an internal lens which forms an airtight interlayer with the exterior lens is fixed to an inner side of the flexible frame; and a heating element used to maintain temperature of the internal lens is disposed on the internal lens. Accordingly, the present invention is able to effectively prevent fogging from occurring because of the temperature difference between body heat from the user and the lenses of the goggles.