This study is fundamental in looking to validate the agreement of Self-Assesment Instrument of Outdoor Competency (OCL-oMR) among the Co-curriculum Center Coaches in Malaysia. The instrument are newly developed by the researcher . The Inventory Responses –oMR (IR-oMR) are purposely to evaluate and determine the goodness of self-assesement instrument of outdoor competency (OCL-oMR) among co-curriculum center coaches in Malaysia. By using the correlation & percentage, the analysis were used. N=10 of head coaches of co-curriculum Center were selected to be a sampels. These data is a secondary data that researcher used in the main research. But as a secondary data, its really important to researcher to identify and justify the newly instrument of self assesment of outdoor competency (OCL-oMR). Findings shown contents validity r=.82 were recorded and the language validity were shown r=.83. Meanwhile, anothers supporting data were used percentage of agreement of Inventory Responses –Omr (IR-oMR) toward the Self-Assesment Instrument of Outdoor Competency (OCL-oMR) among the Co-curriculum Center Coaches in Malaysia. Overall, from these findings, researcher found that’s the Inventory Responses – oMR (IR-oMR) shown that the Self-Assesment Instrument of Outdoor Competency (OCL-oMR) among the Co-curriculum Center Coaches in Malaysia are valid instrument to measure the competency level of outdoor education coaches in co-curriculum center in Malaysia and the Inventory Responses – oMR (IR-oMR) are significantly toward the outdoor competency (OCL-oMR).