The purposes of this research were 1) to study the effects of task-based learning management on English writing ability of Mathayomsuksa two students of Sutabumrung Pittayakarn School in Chachoengsao province 2) to investigate the students satisfaction to task-based learning. The sample used in this study was 25 students studying in the second semester of the 2010 academic year. The instruments used for collecting data were task-based lesson plans, pre-post English writing ability test, writing evaluation form and students satisfaction questionnaire. The statistics used for data analyzing were mean, standard deviation, percentage and t-test.       
	The research results revealed that 1) English writing ability of students through task-based learning after the experiment was significantly higher at the .05 and their writing ability was 84.75 % 2) the students satisfaction to task-based learning management was evaluated at the highest level. 
