Children with physical impairments have low rates of physical activity when compared to children without impairments. Given the benefits that result from sport, improving participation rates among children with physical impairments is essential. Parents have a critical role in supporting their child's involvement in sport. The purpose of this article was to review research regarding psychosocial factors that determine parental support of sport participation for their child with a physical impairment, and present recommendations for future research. This will be done in two parts: first, a critical investigation of current literature using the Health Action Process Approach as a framework; and second, the presentation of a research agenda. By meeting our recommendations and developing knowledge on the determinants of parents' decision to promote sport for their child with a physical impairment, researchers could fill gaps in the literature and may aid in improving sport participation for children with physical impairments.