Disc brake

A disc brake having a caliper arranged in the vicinity of at least one brake disc mounted on a wheel axle of the vehicle, wherein an electric motor, a drive shaft driven by the motor in one rotational direction about a longitudinal axis for brake application and in the opposite rotational direction about the longitudinal axis for brake release, a coupling having a coupling shaft coaxial with the drive shaft for transmitting rotational movement of the drive shaft to the coupling shaft, and at least one thrust rod operationally connected to the coupling shaft are provided in the caliper, said at least one thrust rod transforming rotational movement of the coupling shaft about the rotational axis into linear movement of a disc brake pad along the longitudinal axis for braking engagement with the at least one brake disc, characterized in that the coupling keeps the coupling shaft nonrotatable in the brake release direction when no current is fed to the motor, and is operationally arranged between the electric motor and the at least one thrust rod.