The article is dedicated to a rare text of Acta Thomae, which has so far been found only in a copy in a manuscript of the 16th century. A review of textological features is made and the text is compared with several Slavic and Greek copies. Such a version is not found among the transcripts of the Acts of the Apostle Thomas known to us and is a separate branch of tradition that emerged after the translation of the Actа Thomaе and Acta Thomae Minora. It is believed that the text in Slavic tradition appeared in the 14th century, probably in Bulgaria, but underwent significant revision before being included in Izmaragd. The research includes a publication of the text.