A pair of eyeglasses, including: a lens unit including a pair of temple mounting components respectively disposed on two opposite lateral sides of said lens unit; and a pair of temple units; each of said temple units includes a main temple segment having one end connected to a respective one of said temple mounting components, characterized in that each of said temple units includes a temple end piece that is disposed at an inner lateral side of said main temple segment and that has a fastenable segment, a guide segment distal from said fastenable segment, and a connecting segment disposed between said fastenable segment and said guide segment and swingably connected to said main temple segment, and an engaging mechanism for removable engagement between said fastenable segment and said main temple segment; wherein said temple end pieces of said temple units are movable relative to said main temple segments of said temple units between an engaging position, where said fastenable segments are fastened to said main temple segments via said engaging mechanisms of said temple units and said guide segments of said temple end pieces form a first distance therebetween, and a disengaging position, where said fastenable segments are disengaged from said main temple segments and said guide segments of said temple end pieces form a second distance larger than the first distance therebetween. a lens unit including a pair of temple mounting components respectively disposed on two opposite lateral sides of said lens unit; and a pair of temple units; each of said temple units includes a main temple segment having one end connected to a respective one of said temple mounting components, characterized in that each of said temple units includes a temple end piece that is disposed at an inner lateral side of said main temple segment and that has a fastenable segment, a guide segment distal from said fastenable segment, and a connecting segment disposed between said fastenable segment and said guide segment and swingably connected to said main temple segment, and an engaging mechanism for removable engagement between said fastenable segment and said main temple segment; a main temple segment having one end connected to a respective one of said temple mounting components, characterized in that each of said temple units includes a temple end piece that is disposed at an inner lateral side of said main temple segment and that has a fastenable segment, a guide segment distal from said fastenable segment, and a connecting segment disposed between said fastenable segment and said guide segment and swingably connected to said main temple segment, and an engaging mechanism for removable engagement between said fastenable segment and said main temple segment; wherein said temple end pieces of said temple units are movable relative to said main temple segments of said temple units between an engaging position, where said fastenable segments are fastened to said main temple segments via said engaging mechanisms of said temple units and said guide segments of said temple end pieces form a first distance therebetween, and a disengaging position, where said fastenable segments are disengaged from said main temple segments and said guide segments of said temple end pieces form a second distance larger than the first distance therebetween.