Paolo Ongaro entered the comics field in 1964, inking work of Vladimiro Missaglia. Soon, he started out on his own, illustrating some stories for Horror, written by Pierre Carpi. In 1970 he expanded his activities and illustrated some episodes of 'Diabolik' and comics for Il Monello, L'Intrepido, Il Giornalino, Il Corriere dei Ragazzi, SuperGulp and Collana Eroica. In the second half of the 1970s, he drew among others 'Tarzan' for Cenisio, as well as war stories for the Fleetway agency in London and 'Agente Speciale Magnum for Mondadori's Audax.