Joseph-Marie Jaffré, better known as Job Jaffré (May 6, 1906 - March 12, 1986), was a French journalist and Breton nationalist.
He also published under pseudonyms, most notably as Jos Pempoull.
Jaffré was born in Berné, Morbihan.
His journalistic work was strongly associated with the promotion of Breton culture and language.
He worked on Breton onomastics and toponymy.
He also became active in the Breton separatist movement.
Working for the journal Nouvelliste de Lorient he created the "Celtic Circle of Lorient" and became active in the Breton National Party.
He also worked voluntarily for Loeiz Herrieu's Breton language literary magazine Dihunamb.