restaurateur
Concise Oxford English Dictionary © 2008 Oxford University Press:
restaurateur /ˌrɛst(ə)rəˈtəː, ˌrɛstɒr-/
▶noun a person who owns and manages a restaurant.
usage: The word restaurateur is taken directly from the French form: it should not be spelled restauranteur.
'restaurateur' also found in these Oxford entries:

