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This study aims to (1) describe the types of focalization used in Oka Rusmini’s Tempurung, (2) describe the relation between focalization and the other intrinsic elements, and (3) to describe the relevance of focalization in the novel to the study of literature in Senior High Schools (SMA)/Vocational Schools (SMK). This research is a qualitative research. The data were collected through the library research method by reading and note-taking techniques. The data were analyzed using the descriptive-analytical method. There are three research findings: (1) Oka Rusmini’s Tempurung tends to use internal focalization with the pronoun ”I”; (2) the focalization in the novel appears in various forms, namely direct speech, soliloquy, narrator’s commentary, and characters’ actions that can be directly related to character aspects and language style, and (3) focalization in Oka Rusmini’s Tempurung has relevance to the study of literature in SMA/SMK.