A foldable eyeglasses includes a first lens, a second lens and a foldable structure. The second lens is arranged correspondingly to the first lens; the foldable structure is installed between the first and second lenses; the foldable structure includes a first and a second securement stands, a swivel member and a universal joint. The first and second securement stands are attached to the first and second lenses respectively; the swivel member is pivotally attached to the first securement stand; the universal joint is constructed by a turning head portion extended from the swivel member and a receiving slot provided on the second securement stand; the turning head portion is pivotally attached to the receiving slot. Accordingly, the eyeglasses can have a significantly reduced folded size for storage and portability.