Abstract: This invention relates to buckles and more particularly to a strap buckle for either forming a loop in a flexible strap or for securing one strap to another. It is particularly useful for securing and adjusting the cheek strap or connecting the throat strap of a bridle. The invention provides a rigid plate which is permanently secured to a strap. The plate has a stud designed to pass through an opening in the strap to be connected. The plate is also provided with a pair of sleeves through which both straps pass when they are superimposed over each other and connected. One of the sleeves is slidable along the plate and in one position is centered over the stud. The sleeves are rigid to eliminate flexing under loads which tend to pull the straps apart and thus prevent the straps being separated at the stud.