A painting booth, which includes: a frame which supports a plurality of movable walls ( 3 ) made of deformable material, whose internal surfaces bound a volume which can contain objects to be painted; at least one distributor arranged inside the volume and suitable to distribute painting powders meant to be applied to the surface of the objects to be painted; and removable means ( 10 ) which are suitable to interact operatively with the movable walls, so as to facilitate the removal of residual painting powders which deposit on their internal surfaces; and actuation means ( 6, 7, 11 ) which are suitable to move the movable walls with respect to the removal means. The actuation means include coupling means ( 11 ) for coupling to the movable walls, which are suitable to move the movable walls so as to keep the internal surfaces constantly taut.