Abstract: A hose clamp assembly comprises a belt form of a plate spring body which is in an annular form having opposite ends and is provided with a grooved notch in which an extending piece to be described just below is inserted in a free state to form the same circumferential plane; an extending piece which is integrally provided at one end of the plate spring body along its circumferential direction, bent at its extreme end outwardly along the diametrical direction of the plate spring body to form a stopper and includes a pair of projecting tongues extending outwardly and vertically with respect to its both widthwise sides, the tongues inclining at their extreme ends at the required angles with respect to the stopper; and a receiving piece provided at the extreme end of the other end of the plate spring body, the receiving piece being bent outwardly along the diametrical direction thereof and including a notch somewhat wider in width than the extending piece and a horizontal portion provided with locking grooves spa