Cufflink comprising an elongated central part (1), adapted for being inserted in a cuff-hole, a first end part (2) extending from a first extremity of said central part (1) in a direction transverse to the longitudinal axis of said central part (1), and a second end part (3) extending from a second extremity of said central part (1) in a direction transverse to the longitudinal axis of said central part (1). At least one of said first and second end parts (2, 3) comprises a mobile locking element (20, 30, 23, 33) connected to it, and having an extended locked position and a retracted unlocked position, said locking element (20, 30, 23, 33) protruding or rotating from said end part (2, 3) beyond the corresponding extremity of said central part (1) in the locked position.