Adjustable modular spacer device (1) for the articulation of the knee comprising a tibial component (3), suitable for being fixedly connected to one end of the tibial bone near to the articulation of the knee, a femoral component (2), suitable for being fixedly connected to one end of the femoral bone near to the articulation of the knee and suitable for coming into contact and for being articulated with the tibial component (3), in which the femoral component comprises at least one condylar articular portion (7, 8) and an intercondylar central body (6), in which the intercondylar central body (6) and the at least one condylar articular portion (7, 8) are separate and discrete components of the femoral component (2).