1 e-Journal of Linguistics MIDDLE DIATHESIS IN OLD JAVANESE LANGUAGE By Ni Ketut Ratna Erawati Email: ratnaerawati65@yahoo.com Faculty of Letters and Cultures Udayana University Ketut Artawa Email: artawa56@yahoo.com Study Program of Linguistics, School of Postgraduate Studies, Udayana University I Wayan Pastika Email: wayanpastika59@yahoo.com Study Program of Linguistics, School of Postgraduate Studies, Udayana University Made Sri Satyawati Email:srisatyawati@gmail.com Study Program of Linguistics, School of Postgraduate Studies, Udayana University Abstract Old Javanese Langusage (OJL) is the language of the archipelago which developed rapidly in the IX-XV centuries. The language has so many alternation verbs in the predicate of the clause structure. Therefore, the problem of the present study is interesting to explore. The term refers to the opinion proposed by Shibatani(1998) and Artawa (2003).Diathesis associated with middle in OJL was found to have three types, namely, the middle diathesis morphological, middle lexical, and middle perifrastic. KeyWords: Stucture, function, semantic, diathesis, and middle.