The target of this article was to realize a description on the application of the qualitative method in Physical Therapy, discipline that has based his scientific development on the paradigm of investigation quantitatively, due to his historical origin from the medicine and as a response to the need for attention and rehabilitation of the persons with physical disabilities. The results of the realized review show on one hand the generalities of the qualitative method, his differences with the quantitative approach, in addition to the possible and necessary integration of both approaches. Furthermore, it describes the application and contribution of the qualitative investigation in the construction of the body of knowledge of the Physical Therapy. Bearing in mind the incipient developments of the qualitative investigation realized by the physiotherapists, there stand firm three professional and academic challenges. The generation and the publication of the knowledge from qualitative studies and the development of workmanship in the handling of new hardware of investigation will contribute not only to the advance and professional consolidation, but also to the integral collision of the problems and needs for health related to the human movement. Salud UIS 2007; 39: 105-115.