Good learning assessment provides useful information and helps improve the quality of the teaching and learning process. The purpose of this study was to produce an assessment instrument based on the CGFU PM 515 concept in physical education learning on the long jump material for elementary school students. This study uses research and development (R & D) methods by adopting the Rowntree development model. The stages in the development of this assessment instrument consist of three stages, namely: 1) the first stage is the planning stage, 2) two-stage is the development stage, and 3) the third stage is the evaluation stage. The data collection technique in this development uses expert validation tests and practicality questionnaires for psychomotor assessment instruments. The population in this study were fourth-grade students at Kanggotan Elementary School. To facilitate the implementation the researchers used a sample of 8 students. The validators associated with this instrument are experts in the fields of evaluation, athletics, and physical education. The validation value from the validator uses content validity from Aiken V in three items as follows skills score 1, soft skills score 0,778, and performance score 0,889. Based on these scores, the psychomotor assessment instrument developed is included in the valid and practical categories. Furthermore, the researcher has a plan to be able to socialize this instrument with relevant stakeholders. In addition, researchers also have plans to be able to develop instruments with the CGFU PM 515 concept in other subjects.