Abstract: A retaining device for fastening an appliance insert in a base panel, such as a sink in a kitchen work surface. The device has a retaining clamp that can be fixed in an opening in the work surface, and a retaining web connected to the sink that can be introduced into the retaining clamp from above and anchored in place. The retaining clamp includes an elongated retaining leg and two elastically resilient clamping legs integrally formed, in a U-shaped manner, on the ends of the retaining leg. The retaining leg can be firmly fixed in a predetermined position on the side edges of the opening while the clamping legs have latching teeth oriented towards the retaining leg and into which the retaining web can be latched, by a latching web directed towards the latching teeth, after being pressed into the retaining clamp.