The purpose of this thesis is to compare Mahachat klon thet of Chaophraya Phrakhlang (Hon) with Jatakatthakatha and previous Thai versions of Mahachats, Mahachat Kham Luang and Kab Mahachat, in contents and literary techniques in order to point out the characteristics of Mahachat Klon Thet of Chaophraya Phrakhlang (Hon). The study reveals that Mahachat Klon Thet of Chaophraya Phrakhlang (Hon) appears 7 techniques of content adaptations compared to Jatakatthakatha: content deletion, content appending, detail deletion, detail appending, detail deletion with story combination, detail changing and changing of story orders. The mentioned techniques supports Mahachat Klon Thet of Chaophraya Phrakhlang (Hon) the crucial difference to Mahachat Kham Luang and Kab Mahachat which more strictly follows the story of Jatakatthakatha. However, Mahachat Klon Thet of Chaophraya Phrakhlang (Hon) follows some conventions from Jatakatthakatha, Mahachat Kham Luang and Kab Mahachat. Meanwhile, it has its own innovative ways of showing literary techniques. As a result, Mahachat Klon Thet of Chaophraya Phrakhlang (Hon) harmoniously includes in itself conventions and innovations. As using of the neat literary techniques: the use of alliterations, the splendid word selection, the reduplication and the use of figures of speech, Mahachat Klon Thet of Chaophraya Phrakhlang (Hon) is distinguished in conveying emotional feelings and impression of Bhodhisatta’s perfection of foremost alms. Thus, Mahachat Klon Thet of Chaophraya Phrakhlang (Hon) becomes the high prominent mahachat as one of the first grade diamond of Thai literatures.
