Swimming goggles comprise a lens frame having an inner circumference surface and an outer circumference surface; a decorative frame assembled with the lens frame and located on a side of the outer circumference surface; and head strap devices at least comprising a head strap being of the buoyancy in water, and brackets made for perforation and orientation of the head strap, and further, the head strap having a first linking element and a second linking element capable of being connected or separated each other; wherein the swimming goggles have no sharp corners on their contour causing the injury, could not be disassembled again after assembled to prevent children from mistakenly swallowing their fallen components, provide the buoyancy in water when accidentally fell into water for ease of pickup for children's safety, and have the decorative frame that could simulate images of cartoon characters to bring out nifty and happy feelings.