A device for fitting an object in a dishwasher is provided. The device can be easily integrated as complementary equipment in a large number of the dishwasher racks and provides the user with the possibility of rapidly filling objects and even fitting objects which are non cylindrical in shape. The fixing device comprises a first section designed to be coupled with the rack of a dishwasher, and a second section that extends substantially vertically forming a curve, the first section being designed to be non rotating and to be coupled with a vertical element of the dishwasher rack.