An operation feel feedback input device comprising: a rotary operation unit that rotates in response to an operation force applied by an operator; detecting means (18, 19) that detects the angle of rotation of the rotary operation unit; a rotating member that rotates together with the rotary operation unit; frictional resistance applying means that applies a frictional resistance to the rotating member to generate a resistance force against the operation force applied by the operator; and control means that controls the frictional resistance application by the frictional resistance applying means on the basis of a result of detection by the detecting means (18, 19), characterized in that while a coordinate (Px) corresponding to the angle of rotation of the rotary operation unit is on either one of the right and left sides of a previously defined reference position on a predetermined coordinate axis, when the control means determines that an operation force for shifting the coordinate toward the one side from the reference position is applied to the rotary operation unit, the control means controls the application by the frictional resistance applying means in order to increase the frictional resistance in accordance with a change in the angle of rotation detected by the detecting means (18, 19), and when determining that the operation force for shifting the coordinate toward the one side from the reference position is not applied to the rotary operation unit during the control, the control means replaces the coordinate (Px) corresponding to the angle of rotation of the rotary operation unit with a coordinate of the reference position in the control of the application, the frictional resistance applying means includes an electromagnetic brake that generates an electromagnetic force in response to power supply and applies a frictional resistance to the rotating member using the electromagnetic force, the control means is capable of adjusting the magnitude of current or voltage for the power supply to the electromagnetic brake to control the magnitude of the frictional resistance to be applied by the frictional resistance applying means, and when the coordinate corresponding to the angle of rotation of the rotary operation unit is located in the reference position on the coordinate axis, the control means stops the power supply to the electromagnetic brake; and the control means further includes a signal output section that outputs a coordinate corresponding to the angle of rotation detected by the detecting means (18, 19) as an external output signal, and when the coordinate corresponding to the angle of rotation is replaced with the coordinate of the reference position in the control of the application, the replaced coordinate is output as the external output signal from the signal output section. a rotary operation unit that rotates in response to an operation force applied by an operator; detecting means (18, 19) that detects the angle of rotation of the rotary operation unit; a rotating member that rotates together with the rotary operation unit; frictional resistance applying means that applies a frictional resistance to the rotating member to generate a resistance force against the operation force applied by the operator; and control means that controls the frictional resistance application by the frictional resistance applying means on the basis of a result of detection by the detecting means (18, 19), characterized in that while a coordinate (Px) corresponding to the angle of rotation of the rotary operation unit is on either one of the right and left sides of a previously defined reference position on a predetermined coordinate axis, when the control means determines that an operation force for shifting the coordinate toward the one side from the reference position is applied to the rotary operation unit, the control means controls the application by the frictional resistance applying means in order to increase the frictional resistance in accordance with a change in the angle of rotation detected by the detecting means (18, 19), and when determining that the operation force for shifting the coordinate toward the one side from the reference position is not applied to the rotary operation unit during the control, the control means replaces the coordinate (Px) corresponding to the angle of rotation of the rotary operation unit with a coordinate of the reference position in the control of the application, the frictional resistance applying means includes an electromagnetic brake that generates an electromagnetic force in response to power supply and applies a frictional resistance to the rotating member using the electromagnetic force, the control means is capable of adjusting the magnitude of current or voltage for the power supply to the electromagnetic brake to control the magnitude of the frictional resistance to be applied by the frictional resistance applying means, and when the coordinate corresponding to the angle of rotation of the rotary operation unit is located in the reference position on the coordinate axis, the control means stops the power supply to the electromagnetic brake; and the control means further includes a signal output section that outputs a coordinate corresponding to the angle of rotation detected by the detecting means (18, 19) as an external output signal, and when the coordinate corresponding to the angle of rotation is replaced with the coordinate of the reference position in the control of the application, the replaced coordinate is output as the external output signal from the signal output section.