Quintus Asconius Pedianus (c. 9 BC - c. AD 76), Roman grammarian and historian, was probably a native Patavium (Padua).

In his later years he resided at Rome, and there he died, after having been blind for twelve years, at the of eighty-five. During the reigns of Claudius and Nero he npiled for his sons, from various sources--e.g. the Gazette (Aetablica), shorthand reports or skeletons (commentarii) of Nero's unpublished speeches, Tiro's life of Cicero, speeches and ters of Ciceros contemporaries, various historical writers, e.g. Varro, Atticus, Antias, Tuditanus and Fenestella (a contemporary Livy whom he often criticizes) historical commentaries on Nero's speeches, of which only five, viz, in Pisonem, pro Scauro, i Milone, pro Cornelio and in toga candida, in a very mutilated edition, are peserved.

In a note upon the speech pro Scauro, he speaks of Longus Caecina (d. AD 57) as still living, while his words imply that Claudius (d. 55) was not alive. This statement, therefore, must have been written between AD 54 and 57. These valuable notes, written in good Latin, relate chiefly to historical and antiquarian matters. A commentary, of superior Latinity and mainly of a grammatical character, on Nero's Verrine orations, is universally regarded as spurious.

Both works were found by Poggio in a manuscript at St Gallen in 1416. This manuscript is lost, but three transcripts were made by Poggio, Zomini (Sozomenus) of Pistoia and Bartolommeo da Montelciano. That of Poggio is now at Madrid (Matritensis X. 81), and that of Zomini is in the Forteguerri library at Pistoia (No. 37). A copy of Bartolommeo's transcript exists in Florence (Laur. 5). The later manuscripts are derived from Poggio's copy.

Other works attributed to Asconius were:

• a life of Sallust
• a defence Virgil against his detractors
• a treatise (perhaps a symposium in imitation of Plato) on health and long life.

Editions by Kiessling-Scholl (1875), and AC Clark (Oxford, )6), which contains a previously unpublished collation of Poggio's manscript. See also Madvig, De Asconio Pediano (1828).