The aim of this study was to determine efforts to increase cooperation with friends through the game a leaky pipe in children aged 5-6 years in kindergarten Matan Hilir Negeri 01 North Ketapang. Planning, implementation and improvement of cooperation with friends through the game a leaky pipe in children aged 5-6 years in kindergarten Matan Hilir Negeri 01 North Ketapang. Forms of research is a classroom action research method used is descriptive method. Subjects of this study there were 15 children. Results of this study that obtained planning refers to the Decree of the Year 2009 to prepare a plan for daily activities (RKH). Implementation of the leaky pipeline game has been greatly improved with the child the child\u27s activity reached 98.52%. Increased co-operation with a very significant game leaky pipes and all the children participating to successfully win the game so that cooperation among the children woke up well
