Abstract: An improved leaf spring clamp is provided, particularly for use with composite material leaf springs, to securely fix the position of the leaf spring relative to a wheel axle or other suspension system member, such as in the suspension system of a motor vehicle. The leaf spring clamp comprises a rigid clamp base, a resilient wedge insert, and a rigid clamp plate. The clamp base provides a bottom wall and substantially parallel side walls extending from the bottom wall to form a channel adapted to receive the wedge insert. The inner surface of at leaf one side wall of the clamp base fairs from both ends into a channel-widening concavity, preferably at the longitudinal midpoint of the channel. The wedge insert has a bottom wall and substantially parallel side walls extending from the bottom wall to a top wall and forms an inner channel adapted to laterally jacket the leaf spring.