Carrefour Marinopoulos is a Greek retailer. It was formed in 1999 as a 50-50 joint venture between the Greek Marinopoulos Group and the French Carrefour Group. It is the biggest retail chain in Greece in terms of both turnover and number of stores. As of 2008, the company operates over 300 stores. Carrefour Marinopoulos stores are divided into three formats, differentiated by size and the range of products sold.
Carrefour Marinopoulos also owns 11 hypermarkets (branded Carrefour) and 4 supermarkets (branded Carrefour Express) in Cyprus.
The Carrefour Group and the Marinopoulos Group, through a different joint-venture (Dia Hellas SA), also control the Dia hard discount stores located in Greece.
Until the late 1990s the Marinopoulos super markets were operated as Prisunic-Marinopoulos in cooperation with the 1997 closed french chain Prisunic. The mascot was called ΠιΜί and was on all low cost products.