A concealed hinge, comprising: - a first hinge body installable in a housing of a fixed frame; - a second hinge body installable in a housing of a leaf to be coupled to said fixed frame; - an articulating mechanism connected to said hinge bodies (2, 3) to allow a reciprocal movement of the hinge bodies (2, 3) between a first configuration, in which they are reciprocally distanced, corresponding to an open position of leaf, and a second configuration, in which they are reciprocally near, corresponding to the closed position of the leaf; wherein one of said hinge bodies (2, 3), preferably said second hinge body, comprises a closing device comprising: a sliding rod having a first end connected to said articulating mechanism and slidably movable inside the respective hinge body, following a reciprocal movement of said hinge bodies (2, 3), between a forward position corresponding to the distanced configuration of the hinge bodies (2, 3) and a rearward position corresponding to the neared configuration of the hinge bodies (2, 3); - an elastic means active on a second end of the sliding rod so as to maintain the sliding rod normally pushed towards the rearward position; - a damping means active on the sliding rod so as to exert a push on the sliding rod which is opposite to the action of said elastic means in the passage of the sliding rod from the forward position to the rearward position, in particular to attenuate or limit a stroke speed of the sliding rod, said damping means being arranged and/or configured so that said push opposite to the action of the elastic means originates when the sliding rod takes on a first position comprised between said forward and rearward positions; characterised in that it comprises a disengagement means configured to automatically disengage the damping means from the sliding rod in a second position of the sliding rod located downstream of said first position and towards said rearward position. - a first hinge body installable in a housing of a fixed frame; - a second hinge body installable in a housing of a leaf to be coupled to said fixed frame; - an articulating mechanism connected to said hinge bodies (2, 3) to allow a reciprocal movement of the hinge bodies (2, 3) between a first configuration, in which they are reciprocally distanced, corresponding to an open position of leaf, and a second configuration, in which they are reciprocally near, corresponding to the closed position of the leaf; wherein one of said hinge bodies (2, 3), preferably said second hinge body, comprises a closing device comprising: a sliding rod having a first end connected to said articulating mechanism and slidably movable inside the respective hinge body, following a reciprocal movement of said hinge bodies (2, 3), between a forward position corresponding to the distanced configuration of the hinge bodies (2, 3) and a rearward position corresponding to the neared configuration of the hinge bodies (2, 3); a sliding rod having a first end connected to said articulating mechanism and slidably movable inside the respective hinge body, following a reciprocal movement of said hinge bodies (2, 3), between a forward position corresponding to the distanced configuration of the hinge bodies (2, 3) and a rearward position corresponding to the neared configuration of the hinge bodies (2, 3); - an elastic means active on a second end of the sliding rod so as to maintain the sliding rod normally pushed towards the rearward position; - a damping means active on the sliding rod so as to exert a push on the sliding rod which is opposite to the action of said elastic means in the passage of the sliding rod from the forward position to the rearward position, in particular to attenuate or limit a stroke speed of the sliding rod, said damping means being arranged and/or configured so that said push opposite to the action of the elastic means originates when the sliding rod takes on a first position comprised between said forward and rearward positions;