Ricardo Mosner was born in Buenos Aires and lives and works in Paris.

From the end of the 60s he exhibited and organized performances and happenings. Between 1970 and 1980, he directed and performed about twenty pictorial shows with his troupe Le Théâtre en Poudre (Paris, Amsterdam, Buenos Aires, Lisbon, Barcelona...) As an actor, he worked with Copi, Stephen Frears, Jerôme Savary... He creates performances and performs with Daniel Melingo, bandoneonist Pablo Nemirovsky and the group Tierra del Fuego, duo Volco & Gignoli, Theo Hakola, dancers Amy Fujiwara, Aurélia Jarry, Kaori Suzuki and Silvia Lezcano, singers Marina Cedro and Jeanne La Fonta.

Painter, sculptor and engraver he has exhibited in many museums and international events including the Paris Biennale, the Triennale of the Americas, the Stedelij Museum and the Musée d'Art Moderne de la Ville de Paris. He has made 240 personal exhibitions in France and abroad.

Ricardo Mosner illustrated Alfred Jarry and Edgar Poe at Gallimard, Claude Nougaro and Étienne Roda-Gil at Albin Michel, and has produced artist books with Michel Butor, Bernard Noël, Jacques Jouet and Joël Bastard. He created posters for the Avignon Festival, Les Rita Mitsouko, El Camarón de la Isla, Pascal Comelade, Les Amis du Musée d'Art Moderne, Riccardo del Fra...

He is the protagonist of the film «Le théorème de Mosner» by Esteban Perroud and Daniel Melingo» (Official selection of the BAFICI Festival, Argentina).
Mosner has collaborated on the show “Des Papous dans la Tête” on France Culture for more than 30 years, he is Regent of the Collège de 'Pataphysique and, for twenty years, he organizes exhibitions of the group “El Colectivo” (Paris, Buenos Aires, New York).

In 2022 he created a monumental bas-relief for the City of Bagneux and, on the occasion of this event, a retrospective exhibition is dedicated to him at the Maison des Arts.

His sculptures and paintings are permanently exhibited at the Embassy of the Argentine Republic in Paris.

With the Galerie Lara Vincy, Ricardo Mosner has been exhibiting since 1985. In 2025 he presents the exhibition «Didascalies»: paintings and drawings on various supports, assemblages, sculptures, objects and artist books.