Companions of Prophet (Sahāba) as closest characters to him were the most frequent references in compiling Sirā. So, political and social ups and downs of early Islamic period made a great affection on transmission of Sirā narratives. Djābir b. Abd Allah Ansāri, as a close companion to prophet and five Imāms, important character in Medinian society and his great scholar in hadīth and fīqh, had a prominent role in compiling Sirā. This research intends to analyze his role as first Sirā compiler in Islamic history.