伊塔乌联合银行（Itaú Unibanco）是一家总部位于巴西圣保罗的上市银行，属于伊塔乌投资控股 。是2008年11月4日伊塔乌银行和巴西联合银行合并的结果。二者合并形成的伊塔乌联合集团（Itaú Unibanco Holding S.A.）是南半球最大的金融集团。在资产规模上次于国内的巴西银行。

Redecard由伊塔乌联合银行持有。伊塔乌联合银行在巴西零售银行业占11%的市场份额，它在阿根廷、 智利、巴拉圭和乌拉圭都有分支机构。其业务拓展到了英格兰、卢森堡、葡萄牙、美国、日本、中国、香港和阿拉伯联合酋长国。是伊塔乌投资控股最重要的机构之一。2009年8月22日，该公司宣布与塞古鲁港集团开始成为合作伙伴。

Itaú Unibanco is a Brazilian publicly quoted bank with headquarters in São Paulo, Brazil. The bank is the result of the merger of Banco Itaú and Unibanco, which occurred on November 4, 2008 to form Itaú Unibanco Holding S.A, the largest financial conglomerate in the Southern Hemisphere and is the 10th largest bank in the world by market value. The bank its listed at the BM&F Bovespa in São Paulo and in NYSE in New York. It currently is the second biggest Brazilian bank by assets, after Banco do Brasil.