Cassinari mounted a personal exhibition at the Eendt Gallery of Amsterdam together with the famous sculptor Minguzzi; in that occasion he had the opportunity to be presented at the first international exposition entitled Galeries Pilotes at the Canton Museum of Lausanne. During the first Biennial of Contemporary Art held at the Castello Svevo in Bari, Cassinari exhibited seventeen works dated 1961-1963, which were presented by Russoli. Cassinari’s personal exhibitions took place in the Michaud Gallery of Florence, in the Moretto Gallery of Brescia and in the Ghelfi Gallery of Verona. Together with Morlotti he exhibited his works in Cesenatico, then with Campigli, Carrà and Morandi at the Bergamini Gallery in Milan. With two artistic groups called La pittura di opposizione tra il 1925 e il 1945 and Post-cubism abstract-concrete, Cassinari took part in the XIV National Exhibition Premio del fiorino held in Florence at the Palazzo Strozzi. Cassinari exhibited ten works at the exhibition Gli artisti di Corrente which was organized by Valsecchi at the Cultural Centre Olivetti in Ivrea; he also took part in other Corrente exhibitions held in the Palazzo della Gran Guardia of Verona, in the Art Civic Gallery of Milan and in the Sala Comunale della Cultura of Modena.