神圣使徒大公亚述东方教会（The Holy Apostolic Catholic Assyrian Church of the East）（叙利亚语： ܥܕܬܐ ܩܕܝܫܬܐ ܘܫܠܝܚܝܬܐ ܩܬܘܠܝܩܝ ܕܡܕܢܚܐ ܕܐܬܘܪ̈ܝܐ）根据牧首玛尔·丁哈四世的说法，这个基督教教会可以追溯到塞琉西亚─泰西封座堂，据说是由圣多马和圣马理以及亚戴所创建起来的，明示在亚戴的教训（Doctrine of Addai）之中。这派教会有时被称为「聂斯脱里派教会」或是「波斯教会」。

它有时候称自己为亚述正统教会，并且有时也错误地被认为是东方正统派的团体。 称它为「正统」的用法不被发现于教会的礼文书中，亦不是在任何一封官方书信，但是后期和混淆不清的用法称它是属于东正教以及东方正统教会。条文「正确的信条」或者「正确的教义」在亚述语也是不被见于任何的团体的学术用语。在叙利亚文译作「trisa subHa」。在印度，为人所知为叙利亚加色丁教会。东方亚述教会在西方常被人认为是聂斯脱里派教会，既使该教会将这个名称和它当作有关系的争议等同是诬蔑。教宗若望保禄二世称赞它作为「受难者的教会」，因为在教会的历史曾迫害著名的殉道者。教会宣称，其它教会没有像叙利亚东方教会一样曾经历这么多的死难。

The Assyrian Church of the East (Syriac:ܥܕܬܐ ܕܡܕܢܚܐ ܕܐܬܘܖ̈ܝܐ‎ ʻIdtā d-Madnĕkhā d-Āturāyē), officially the Holy Apostolic Catholic Assyrian Church of the East (Syriac:ܥܕܬܐ ܩܕܝܫܬܐ ܘܫܠܝܚܝܬܐ ܩܬܘܠܝܩܝ ܕܡܕܢܚܐ ܕܐܬܘܖ̈ܝܐ‎, ʻIdtā Qaddishtā w-Shlikhāitā Qattoliqi d-Madnĕkhā d-Āturāyē), is a Syriac Church historically centred in Assyria, northern Mesopotamia, an area which is today encompassed by northern Iraq, north eastern Syria, south eastern Turkey and north western Iran. It is one of the churches that claim continuity with the historical Patriarchate of Seleucia-Ctesiphon – the Church of the East. Unlike most other churches that trace their origins to antiquity, the modern Assyrian Church of the East is not in communion with any other churches, either Eastern Orthodox, Oriental Orthodox, Roman Catholic or Protestant, although the modern Chaldean Catholic Church is an offshoot of the Church of the East.