Fortuna Conservatrix is an aspect of the Roman Goddess of Fate and Luck. Her name means "Fortuna the Preserver", "Fortuna the Defender" or "Fortuna the Protectress". She seems to have been worshipped especially by soldiers, as several altars dedicated to Her have been found in the northern outposts of Britannia, in Mamucium (modern Manchester, England—incidentally the Roman name comes from a Celtic word and means "Breast-shaped Hill"!), Castra Exploratum (which means "Test Camp" and is an indication of the tentative nature of the settlement, modern Netherby), and Cilernum (Chesters) on Hadrian's Wall. On the northernmost limit of the Empire, up among the painted Picts, the Romans must have felt especially nervous and in need of Fortuna's protection and good luck.

Not everyone at the outposts was Roman by birth, though, as the fort at Cilernum was at one time manned by a cavalry division from Austria; the altar there was dedicated to Fortuna Conservatrix by one Venenus, named on the altar as a "German". On the altar Fortuna is depicted in a naive provincial style, with what is probably a cornucopia, and what may be a tiny wheel behind Her. Though not Roman, Venenus was still a long way from home in a strange land, and in need of Fortuna's protection.

Conservatrix was also used as an epithet of Juno.