This research paper discusses the development of an instrument to measure the attitude to science displayed by indigenous pupils. The two main objectives of this research are to build a set of criteria for developing a correct attitude to science among indigenous pupils and to determine the reliability of each criterion to develop a correct attitude to science among indigenous pupils. A qualitative approach using document analysis and an expert interview protocol was undertaken to build the criteria for developing a correct attitude towards science among indigenous pupils. Data from the document analysis and expert interviews were analysed manually using the frequency matrix table. Cohen's Kappa reliability analysis was used to determine the agreement index items for each criterion identified. The reliability of the nine criteria and 28 dimensions that were established to measure attitude towards science among indigenous pupils was tested using the quantitative approach. To obtain the reliability score of these criteria, questionnaires were distributed to 31 indigenous pupils throughout Johor, Malaysia. The Kappa coefficient value was 0.84, which showed very good agreement. The responses were analysed using the Rasch Measurement Model as available in Winstep software. The Cronbach's Alpha value for the criteria was 0.98. The development of the instrument to measure the attitude of indigenous pupils towards science is one of the research efforts to enhance the learning competency of indigenous pupils, especially in the aspect of knowledge. The outcome of this research will be one of the key elements for future research in developing a science competency standard for indigenous pupils.