A device for retaining a snowboard boot includes a base on which the sole of the boot is adapted to rest, a turned-up heel support portion extending upwardly from the base at the rear of the device, and a dorsal support element. The dorsal support element extends upwardly from the heel support portion and is journalled on the heel support portion along an axis substantially contained in the median vertical longitudinal plane of the base. The device includes an elastic return device that elastically opposes inclination of the dorsal support element on at least one of the lateral sides of the device by rotating about the axis during rocking of the boot. The device provides binding support during lateral bending while preserving freedom of movement.