A band clamping device including a frame having an elongated planar base and a pair of spaced parallel side walls extending upwardly from the sides of the base. A rotary winding shaft extends transversely across the frame and is rotatably mounted in the side walls. The shaft has ratchet teeth disposed circumferentially around its circumference adjacent one end of the shaft interiorly of the spaced walls to form a ratchet wheel on the shaft. The elongated base has an extension at one end bent over upwardly partially upon itself with a part of the free end of the bent over portion forming a resilient pawl operatively and resiliently engaging the teeth of the ratchet wheel for releasably holding the shaft from rotating. A flexible clamping band is provided for encircling an associated object to be clamped and is secured at one end to the base. The shaft has a band insertion slot formed longitudinally in the shaft between the side walls for receiving the free end portion of the band therein, whereby a preselected length of the free end portion of the band may be inserted in the slot after which the shaft may be rotated to bend and lock the free end portion of the band in the device. The shaft is rotatable clockwise or counterclockwise to selectively lock or unlock the free end portion of the band.