Purpose: The aim of this study was to evaluate wheelchair basketball skills in athletes representing the different functional classification levels and various types of disabilities. Materials and methods: One hundred nine athletes from the Polish and Lithuanian national wheelchair basketball leagues participated in the study. Six standardized skill tests were included: 20-m sprint, two-handed chest pass, slalom without the ball, slalom with the ball, modified Cooper 12-minute test, and the envelope drill. Results: The results demonstrated that there were observable differences between the skill tests performance and the functional classes; the higher functioning classes performed better. However, there was no significant difference between functional classes 1 and 2, as well as between classes 3 through 4.5 (p> 0.05). Conclusion: Regardless of the classification level, athletes with cerebral palsy consistently performed the poorest. A reexamination of athletes with cerebral palsy and how they fit into the functional classification system should be undertaken.