his study aims to describe the forms of locutionary speech acts and analyse the functions of illocutionary speech acts in Chairil Anwar’s poem Diponegoro, as well as to explain the role of both as vehicles for socio-political criticism. This study is based on the view that poetry functions not only as an aesthetic text, but also as a linguistic act that conveys ideological stances, moral appeals, and criticism of social reality. The research employs a descriptive qualitative approach within the framework of literary pragmatics. The source of the research data is the poem Diponegoro, whilst the data consists of words, phrases, lines and stanzas containing locutionary and illocutionary speech acts. The data was collected through reading, listening and note-taking, and was subsequently analysed through data reduction, data presentation and the drawing of conclusions. The results of the study indicate that locutionary speech acts in the poem Diponegoro are dominated by declarative and imperative forms. Declarative forms are used to present the figure of Diponegoro, depict the atmosphere of the struggle, the imbalance of power, combat readiness, and the relationship between servitude, oppression, and destruction. The imperative form is used to direct action directly. The dominant illocutionary acts include the functions of inviting, calling upon, asserting, inspiring enthusiasm, rejecting submission, criticising oppression, and fostering collective courage. Through these functions, this poem not only conveys a literal meaning, but also moves the reader towards a stance of resistance against domination. This study demonstrates that the speech acts in the poem Diponegoro serve as a vehicle for socio-political criticism of oppression, a submissive mindset and the injustices of power, whilst simultaneously affirming the values of resistance, dignity, freedom and solidarity. Thus, this poem by Chairil Anwar is not merely aesthetic in nature, but also ideological and communicative.