Abstract: A fastener for sports shoes, particularly for skiing boots or mountaineering boots, comprises a base member (1), which is adapted to be secured to one side part of the quarter of the shoe and is provided with a track (10), which extends in the direction in which the fastener is to be tightened. That track receives a slider (2). A tightener lever (4) is pivoted on said slider and provided with a loop member (5), which is adapted to be hung into a hook provided on the other side part of the quarter. A locking block is provided for connecting the slider (1) in the desired position.