SBOBET also sponsor West Ham Utd so there's no problems with licensing this time.
Cardiff City chairman and chief executive Peter Ridsdale said: "In these challenging times, it is very pleasing that the Club has secured a sponsorship contract with such a significant partner as SBOBET.
"We look forward to working with SBOBET, who are making a most meaningful contribution to enabling Cardiff City to realise our considerable potential."
"Our new relationship with SBOBET also underlines the fact that Cardiff City, which has grown massively as a club in recent years, is in a position to attract major sponsors."
The deal takes in the rest of this campaign and all of next season.
City will wear the new shirts against Derby tonight.