Regulation device (1) for the upper rack (2) of a dishwasher suitable for regulating an operating position of the upper rack (2) itself and presenting a regulation plate (5) defining a number of operational washing positions of the upper rack (2) itself, and a selecting element (20), which is integral with the rack (2) and which is coupled in selectively disengageable fashion to the regulating plate (5) in order to permit the selective regulation of each operational washing position; at least one vertical guide track (10) being coupled in sliding fashion to the selecting element (20), and one or more revolving elements (50) being interposed between the vertical guide track (10) and the selecting element (20) themselves.