Improved hinge (1; 100; 150; 200; 250; 300) for revolving shutters, especially of shower boxes, comprising a structural assembly which includes: - a strike block (2; 201) defining a substantially vertical main axis and suitable to be made integral with a fixed or bearing auxiliary structure (A'); - a pair of shaped flanges (3, 4; 103, 104; 203, 204; 253, 254) opposite, facing and coupled each other through fastening means in such a way as to define at least: • a side recess in which said strike block is substantially housed (2; 201); • a side groove which communicates with the outside and develops for at least part of the perimeter of each of said shaped flanges (3, 4; 103, 104; 203, 204; 253, 254) and is suitable to receive a peripheral portion of a revolving shutter of a shower box; • an inner seat hidden from view in which rotation means are stably housed defining an auxiliary axis (Y') parallel to said main axis of said strike block (2; 201) and cooperating, on one hand, with said strike block (2; 201) in such a way as to define a first operative position, in which said revolving shutter closes totally, remaining stable in position, a room of said shower box, and at least one second operative position, in which said rotating shutter, as a result of rotation around said main axis imparted by a user, opens fully, remaining stable in position, said room of said shower box, and, on the other side, with elastic means suitable to retain said rotation means stably against said strike block (2; 201) at each of said operative positions, characterized in that said elastic means comprise an elastically yielding laminar body shaped in such a way as to substantially embed in its own overall encumbrance said rotation means that include a single idle roller (12; 156) which is fixed to said laminar body by means of constraint means and extends for the entire height, defined parallel to said main axis, of a head portion of said strike block (2; 201), opposite to the base portion associated with said fixed or bearing auxiliary structure (A'), wherein that said constraint means comprise a pair of side pins (16, 17), projecting axially from opposite sides from said idle roller (12; 206), and a pair of concave open-profiled recesses (18, 19), made in a pair of side flaps (20, 21) opposite each other protruding from the main central portion of said laminar body, said side pins (16, 17) being received into said open-profiled recesses (18, 19) where they are stably kept through coupling means. - a strike block (2; 201) defining a substantially vertical main axis and suitable to be made integral with a fixed or bearing auxiliary structure (A'); - a pair of shaped flanges (3, 4; 103, 104; 203, 204; 253, 254) opposite, facing and coupled each other through fastening means in such a way as to define at least: • a side recess in which said strike block is substantially housed (2; 201); • a side groove which communicates with the outside and develops for at least part of the perimeter of each of said shaped flanges (3, 4; 103, 104; 203, 204; 253, 254) and is suitable to receive a peripheral portion of a revolving shutter of a shower box; • an inner seat hidden from view in which rotation means are stably housed defining an auxiliary axis (Y') parallel to said main axis of said strike block (2; 201) and cooperating, on one hand, with said strike block (2; 201) in such a way as to define a first operative position, in which said revolving shutter closes totally, remaining stable in position, a room of said shower box, and at least one second operative position, in which said rotating shutter, as a result of rotation around said main axis imparted by a user, opens fully, remaining stable in position, said room of said shower box, and, on the other side, with elastic means suitable to retain said rotation means stably against said strike block (2; 201) at each of said operative positions, • a side recess in which said strike block is substantially housed (2; 201); • a side groove which communicates with the outside and develops for at least part of the perimeter of each of said shaped flanges (3, 4; 103, 104; 203, 204; 253, 254) and is suitable to receive a peripheral portion of a revolving shutter of a shower box; • an inner seat hidden from view in which rotation means are stably housed defining an auxiliary axis (Y') parallel to said main axis of said strike block (2; 201) and cooperating, on one hand, with said strike block (2; 201) in such a way as to define a first operative position, in which said revolving shutter closes totally, remaining stable in position, a room of said shower box, and at least one second operative position, in which said rotating shutter, as a result of rotation around said main axis imparted by a user, opens fully, remaining stable in position, said room of said shower box, and, on the other side, with elastic means suitable to retain said rotation means stably against said strike block (2; 201) at each of said operative positions,