本研究以臺灣學生學習成就評量資料庫（TASA）釋出的「2011年高中國文科問卷調查」資料，共7,383位學生為研究樣本進行分析，旨在探討高中二年級學生的課外閱讀行為、學習興趣與學習成就之間的關係，使用結構方程模式進行驗證。研究結果顯示，整體模式的適配度良好，學生的課外閱讀行為對於學習興趣、學習成就皆有正向影響，學生的課外閱讀行為可以透過學習興趣影響學習成就。

This study used the data of the “2011 Mandarin Learning Survey of Senior and Junior High School Students” released from the Taiwan Assessment of Student Achievement (TASA) database. For the analysis, the sample size included 7383 students. A Structural Equation Model was adopted to examine the relationships among extracurricular reading behavior, learning interests, and mandarin achievement of sophomores at senior high schools. Research results show that the overall model fit is good. Students’ extracurricular reading behavior has positive influence on both learning interests and mandarin learning results. Students’ extracurricular reading behavior could affect mandarin learning results through learning interests.