The purposes of this study were to assess reading comprehension ability of the second and third-grade elementary studends. The content of test contained interpretation of word and sentence (10 items), sentence comprehension (7 items), proposition combination (8 items), and reading test (8 items), in total 33 items. 1039 second and third-grade elementary studends were sampled from Taipei City. Retest coefficient was .916, to reach .001 significant level, exhibited the test had good stability, simultaneously content and construct validity were provided, norm of percent rank and T score also were built.