Abstract: An angle adjustment mechanism for a temple of eyeglasses comprises a square recess at an endpiece of a rim, a hole through the square recess, an abutment member including a square member shaped to conform to the square recess, an annular projection on the square member, a first annular toothed portion spaced from the square member by the annular projection, and a plurality of slits across the first annular toothed portion for providing a flexibility when the first annular toothed portion is compressed, a pivot member pivotably secured to the temple, the pivot member including an annular recess and a second annular toothed portion on the bore of an aperture therethrough, and an engagement member including a plurality of protrusions with latched ends, any two adjacent protrusions being separated by a gap.