Verdinaso (Verbond van Dietsche Nationaal-Solidaristen, lit. 'Union of Dutch National Solidarists'), sometimes rendered as Dinaso, was a small fascist political movement active in Belgium and, to a lesser extent, the Netherlands between 1931 and 1941.
Verdinaso was founded by Joris Van Severen, Jef François, Wies Moens, and Emiel Thiers on 6 October 1931 at a meeting in the Hôtel Richelieu in Ghent. It emerged from the Flemish Movement although, under Van Severen's leadership, it moved towards a novel authoritarian political ideology, which he referred to as National Solidarism.