大通布岛和小通布岛（波斯语：تنب بزرگ و تنب کوچک‎，Tonb-e Bozorg和Tonb-e Kuchak；阿拉伯语：طنب الكبرى وطنب الصغرى‎，Tunb al-kubra和Tunb al-sughra）是波斯湾东部的两座小岛，靠近霍尔木兹海峡，战略位置重要。历史上该岛先后为忽里模子、葡萄牙和英国统治。1971年11月，英国殖民势力撤离海湾后，伊朗出兵占领了原属英国保护地的阿布穆萨岛和大小通布岛。然而阿联酋对此表示反对，宣称对三岛拥有主权。现两岛属于伊朗霍尔木兹甘省管辖。

Greater Tunb and Lesser Tunb (Persian: تنب بزرگ و تنب کوچک ‎‎, Tonb-e Bozorg and Tonb-e Kuchak, Arabic: طنب الكبرى و طنب الصغرى ‎, Tunb el-Kubra and Tunb el-Sughra; are two small islands in the eastern Persian Gulf, close to the Strait of Hormuz. They lie at 26°15′N 55°16′E / 26.250°N 55.267°E / 26.250; 55.267 and 26°14′N 55°08′E / 26.233°N 55.133°E / 26.233; 55.133 respectively, some 12 kilometres from each other and 20 kilometres south of the Iranian island of Qeshm. The islands are administered by Iran as part of its province of Hormozgan, but are also claimed by UAE as a territory of the Emirate of Ras al-Khaimah.