Abstract: This research objective were: (1) to describe the validity of reading material based on contextual approach to improve understanding and environmental concern attitude of fourth grade students elementary school, (2) to describe the practicality of reading material based on contextual approach to improve understanding and environmental concern attitude of fourth grade students elementary school (3) to describe the effectiveness of reading materials based on a contextual approach to improve understanding and environmental concern attitude of fourth grade students elementary school. This development research using Dick and Carey modification model which consisted of: (1) identify instructional goals, (2) conduct instructional analysis, (3) analyze learner and context, (4) write performance objectives (5) develop assessment instrument, (6) develop instructional strategy, (7) develop and select instructional methodl, (8) design and conduct formatif evaluation of instruction, (9) revise instruction. Data collection using questioner, observation and test. data was analyzed quantitative descriptively. Research result obtained reading material validity as big as 3.8 with very valid category. learning implementation observation result obtained percentage 95% with implemented category. Teacher and student responds obtained percentage 98% and 95% with very practical category. Understanding test result improved from 72 to 87 with minimum achievement criterion is 75. environmental concern attitude observation result improved from percentage 48% to 82% with already entrenched category. Research result discussion showed that the development of reading material based contextual approach can improved fourth grade elementary school student’s understanding and environmental concern.