Jesús Blasco, considered to be one of the masters of Spanish comics, made his debut in 1935, when his first illustrations were published in the Spanish version of the magazine Mickey. For Boliche magazine, he created 'Cuto' one of his best-known characters. In 1940, he started working for Chicos, in which he continued 'Cuto' and produced several adventure and science fiction comics. For the new magazine Mis Chicas, he started 'Anita Diminuta' (1941) and 'Los Tres Inseparables' (1943), while at the same time working for a number of other magazines.
In the beginning of the 1960s, Blasco started an international career with the British publishing agency Fleetway, for which he produced 'Steel Claw', 'Billy the Kid', 'Buffalo Bill', 'The Indestructible Man' and many other titles. In 1968 he started 'Los Guerilleros, from scripts by Cusso, in Spirou magazine, where he also worked on 'Paul Foran' (text by Gil). Through Studio Ortega, he was also present on the German market with contributions to the Pabel Verlag magazine Tom Berry.
At the end of the seventies and beginning of the eighties, Jésus Blasco was involved, together with his brothers Alejandro and Adriano, with 'Une Bible en Bande Dessinée', (scenario by Claude Moliterni). After that, he worked on 'Tex Willer' and 'Capitan Trueno' with writer Victor Mora, with whom he also made the medieval series 'Tallafero' (1987).