Swimming goggles

Swimming goggles comprising a frame unit, lenses and buckles assembled on the frame unit, and a strap element with at least a head strap, the head strap defining a plurality of stop grooves, the buckles being capable of abutting or releasing the stop grooves of the head strap, each buckle comprising:

• an abutting arm having a stop end and a pivot shaft, the stop end forming a stop block;
• an operating lever being movable transversely and driving the abutting arm to move, and including at least a guiding bar;
• a base including an engraving portion, an axis support, and at least a rail, the axis support being formed lengthwise along a part of the engraving portion and assembled with the pivot shaft, the at least a rail being transversely disposed on the engraving portion and neighboring the axis support;
• and
• a cover assembled to the base, the abutting arm and the operating lever being covered by the cover and the base, respectively;
• wherein a recessed portion is defined at a center of the operating lever, the recessed portion forming a first inclined surface, the stop block forming a second inclined surface for corresponding to the first inclined surface, the first and second inclined surfaces respectively tilting at a same angle and being attachable to each other, and when the operating lever moves transversely, the second inclined surface of the abutting arm moves along the first inclined surface to bring the stop end to move upward or downward to abut or release the stop grooves of the head strap.