In order to provide a sink accessory for placement on a sink, comprising a coupling device for coupling the sink accessory to a coupling side wall of a sink of the sink in a working position, which can be positioned in a simple and stable manner on the sink, without the Sink or on a worktop to which the sink is arranged, a plurality of horizontal support surfaces must be formed at the same height level and without the functionality of the sink accessory or the sink is limited, it is proposed that the coupling device, an inner coupling element that in the working position an inner side of the coupling side wall facing the interior of the basin can be applied, and an outer coupling element, which in the working position can be applied to an outer side of the coupling side wall facing away from the interior of the basin, comprises.
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