Francisco Hidalgo was born in the Andalusia region, and studied fine arts in Madrid, Barcelona and Paris. He began his career as a comic artist. Sometimes using the pseudonym Yves Roy, began his career drawing for Gran Chicos and Chicos. From 1948, he adapted the police novels of Rafael González into the comic series 'Doctor Niebla'. Written at first by Silver Kane and later Victor Mora, this series continued until 1959 in such magazines as Superpulgarcito and Le Supplemento de Historietas de DDT. Hidalgo also drew the series 'Dick Tober' for Acotan, as well as 'Angel Audaz' in Nuevo Coyotte. In the mid-1950s, he emigrated to France, where he began doing comics for Spirou and Pierrot ('Zalta el Libertador'). With writer Guy Hempay, he created the series 'Blason d'Argent' in Coeurs Vaillants in 1957. This series was later continued by Guy Mouminoux.
Among his most famous series are 'Bob Mallard', that appeared in Vaillant with scripts by Jean Sanitas, and 'Teddy Ted', a series for which he drew the first three episodes with scripts by Roger Lécureux. In the magazine Pilote, Hidalgo illustrated several short stories, as well as the series 'Luc Lancier - Prototype 2000' and 'Éric Murat'. His work was also published in Record ('Jack de Minuit', written by Jacques Lob) and Chouchou ('Pat Patrick et la Dame de Hong Kong'). From the sixties he became a famous photographer.