A modulable sports wheelchair includes a supporting frame, a front wheel, a pair of rear wheels and a sitting cage. The supporting frame is divided into a front half-frame connecting a support for the front wheel with a frame structure carrying the rear wheels. The frame structure has at least two longitudinal sides oriented in the movement direction of the wheelchair and two transverse sides spaced and oriented in the other direction so as to form the cage, which takes the shape of a compartment free from internal structural elements and is adapted to receive an athlete with an optimal position for propelling the wheelchair depending on the level and type of disability of the athlete.