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Midterm exam is used to asses the extent of students‘ outcomes and mastery level of competencies in half-one semester of learning. This study aims to analyze the characteristics of item test of mathematics midterm exam of 11th grade secondary students. This study was quantitative research using descriptive explorative approach. Midterm test script consist of 40 questions with its answer key and 145 students answer sheets have collected. The midterm script and its answer key ware validated by three expert and students answer sheet was analyzed using classical test theory method using QUEST. The study shows that midtest test script and its answer key was valid with score 0,93 using Aiken indeks and internal consitency score was 0,74. It means that midtest script was feasible in learning but cannot be used to reflect students- knowledges and skills. Fit Pt-biserial score was 52,5% and Low Pt-biserial score was 47,5%. Besides, 4 items ware categorized as difficult problems, 34 items were medium and 2 items were easy problems. The difficult items consist of the arithmetic series related to real problems, infinite geometric series, algebraic limits with substitution of fraction forms containing roots and factorzation of fraction forms containing exponential.