Geared motor for rolling shutters, comprising: - an electrical motor provided with a drive shaft that slides axially; - a reducer coaxially coupled to the electrical motor; said reducer being connected to the drive shaft of the electrical motor and being suitable for being connected to a winding shaft of a rolling shutter in order to transmit a motion from said electrical motor to said winding shaft of the rolling shutter; - uncoupling means of the electrical motor from the reducer; said uncoupling means being connected to the drive shaft to make the drive shaft slide away from the reducer; - an anti-return device connected to the drive shaft to prevent the motion from being transmitted from the reducer to the electrical motor; said anti-return device being integral in rotation with the drive shaft; - an emergency device that cooperates with the anti-return device, the drive shaft and the reducer to uncouple the drive shaft from the reducer when the uncoupling means are operated; wherein said anti-return device comprises a toothed cylindrical internal cup and a toothed cylindrical external cup that are contained one inside the other one; characterized in that said anti-return device comprises a helical torsional spring contained in the internal cup and provided at the ends with two radial hooks (80, 81) that are faced outwards; a first hook being engaged against the edge of one of the teeth of the internal cup; a second hook being engaged against the edge of a tooth of the external cup; and further characterized in that said emergency device comprises: - a toothed cover slidingly integral with the drive shaft; said toothed cover being connected to the anti-return device in such a way to rotate integrally with the anti-return device; said toothed cover being suitable for being rotationally engaged with said reducer; - a helical compression spring disposed between the anti-return device and the toothed cover in such a way as to push and engage the toothed cover with said reducer; wherein, when operated, said uncoupling means are able to overcome the antagonist force of said helical compression spring, uncoupling the toothed cover from the reducer; wherein on the side facing towards the electrical motor, said toothed cover is provided with first front teeth that engage in corresponding counter-teeth provided on the edge of the external cup facing towards the reducer; wherein on the side facing towards the reducer, said toothed cover is provided with second front teeth that engage with a first gear of the reducer, in such a way that the reducer rotates integrally with the toothed cover when the uncoupling means are not operated. - an electrical motor provided with a drive shaft that slides axially; - a reducer coaxially coupled to the electrical motor; said reducer being connected to the drive shaft of the electrical motor and being suitable for being connected to a winding shaft of a rolling shutter in order to transmit a motion from said electrical motor to said winding shaft of the rolling shutter; - uncoupling means of the electrical motor from the reducer; said uncoupling means being connected to the drive shaft to make the drive shaft slide away from the reducer; - an anti-return device connected to the drive shaft to prevent the motion from being transmitted from the reducer to the electrical motor; said anti-return device being integral in rotation with the drive shaft; - an emergency device that cooperates with the anti-return device, the drive shaft and the reducer to uncouple the drive shaft from the reducer when the uncoupling means are operated; - a toothed cover slidingly integral with the drive shaft; said toothed cover being connected to the anti-return device in such a way to rotate integrally with the anti-return device; said toothed cover being suitable for being rotationally engaged with said reducer; - a helical compression spring disposed between the anti-return device and the toothed cover in such a way as to push and engage the toothed cover with said reducer;