A device for tensioning and locking air cargo net straps. A frame has laterally spaced side webs having elongated grooves in which is slidably mounted a wedge member. A clamping lever cooperates with the wedge member in clamping a free end portion of a strap disposed therebetween and reversely over the wedge member. A control lever pivotally mounted on the frame has laterally spaced lugs on which is mounted a roller that is moved to a position engaging the clamping lever to clamp the strap when the control lever is in a locking position. The control lever moves the roller away from the clamping lever to release the strap when it is moved to an unlocked position.