The Western Ghats region is an intrinsic part of Kerala's biodiversity, characterized by year-round greenery and an abundance of evergreen forests. The favorable climate, soil conditions, and physical factors have contributed to the state's biological richness. However, the indiscriminate use of land for activities such as cultivation and grazing has had a detrimental effect on vegetation, its composition, and its capacity for regeneration. Against this backdrop, a study was conducted to develop a scale for measuring the performance effectiveness of biodiversity management at Grama Panchayats in Kerala. Five dimensions were identified based on a literature review and expert opinion, facilitating easy classification and measurement of the performance effectiveness of the Biodiversity Management Committee (BMC). These dimensions include conservation, sustainable use of biodiversity and access and benefit sharing (ABS), documentation, biodiversity education awareness, and capacity building, as well as administrative and advisory functions. A total of 120 statements were gathered under the five dimensions of the performance effectiveness of BMC. Those items that secured a relevancy score of 80 and above were selected. Out of 120 statements 54 consistent statements were selected through the relevancy test. Out of these, 35 statements were chosen for the final scale, based on 't' value of more than 1.76. The correlation of the reliability coefficient (r = 0.907) was significant at the 0.05 level of probability. The reliability and validity of the scale indicate the consistency and precision of the results. The scale was found to be reliable and valid, providing a valuable tool for measuring the performance effectiveness of the Biodiversity Management Committee (BMC) at Grama Panchayats in Kerala.