The purpose of this study was to study word problem solving ability on Volume of Three Dimensional Geometric Figures of Mathayom Suksa 3 students through multimedia. The target group was 30 Mathayom Suksa 3 students in the first semester of the academic year 2014 at Pasang school, Pasang District, Lamphun Province. Research instruments were 7 learning plans with 12 sessions, record of after teaching and the word problem solving ability test on volume of geometric figures which had 5 items with index of difficulties during 0.25 – 0.58 , index of discrimination during 0.43 – 0.80 and the reliability was 0.83. Data were analyzed by mean, percentage and content analysis. The research findings showed that students who were able to solve the word problem solving ability test passed the criteria at 60% total scores had 24 students which were about 86.67% of total students. Using multimedia helped students better understand in solving problem. Most of students could draw figures, identify the numbers from the problem in the figures correctly, determine the way and able to solve the problems.