Method for manufacturing composite parts with changes in thickness

Method for manufacturing composite parts with thickness changes. Comprises a first stacking step and a second step of shaping and curing, wherein: in the second step, a forming tool (29) adapted to the configuration of the part (11) except in the area affected by the change is used of thickness; in the first stage are successively stacked one or more preforms (21, 23) of the piece with a fabric (31, 33) with the required dimensions for the change in thickness occurs, foils (35) of peelable material and a additional fabrics (41, 43) so the resulting stacked have the necessary to accommodate the forming tool (29) thickness; at the end of the second stage, the laminates (45, 47) resulting from said complementary fabrics (41, 43) and blades (35) of peelable material are removed.