An electric parking brake device comprising: a screw shaft; a brake cable; an actuator case that supports the screw shaft movably in an axial direction thereof; an electric motor that is supported by the actuator case rotatably forward and backward; a motion conversion mechanism that has a nut to be screwed onto the screw shaft rotatably in response to an operation of the electric motor, enables conversion from a rotational motion generated by the electric motor to a linear motion of the screw shaft, and is accommodated in the actuator case; and a resilient member that is compressed when the screw shaft is moved to a side loosening the brake cable, wherein switching between a parking brake state reached by pulling the brake cable and a parking brake release state reached by loosening the brake cable is performed by a change in a rotational direction of the electric motor, wherein the nut is screwed onto the screw shaft movably in the axial direction within a restricted range, and a movement restricting portion, the movement restricting portion restricts an end of axial movement, toward the side loosening the brake cable, of the screw shaft or of a linked member that moves axially together with the screw shaft by causing the screw shaft or the linked member to abut against the movement restricting portion, wherein the screw shaft is connected to the brake cable so as to be prevented from rotating; and the movement restricting portion is provided in a fixed position in the actuator case; characterized in that the resilient member is interposed between the nut and an insertion member accommodated and fixed in the actuator case so as to be compressed in response to axial movement of the nut after the movement end of the screw shaft or the linked member is restricted by the movement restricting portion when the screw shaft moves axially to the side loosening the brake cable; wherein the movement restricting portion is provided integrally with the insertion member so that the resilient member is interposed between the movement restricting portion and the nut. a screw shaft; a brake cable; an actuator case that supports the screw shaft movably in an axial direction thereof; an electric motor that is supported by the actuator case rotatably forward and backward; a motion conversion mechanism that has a nut to be screwed onto the screw shaft rotatably in response to an operation of the electric motor, enables conversion from a rotational motion generated by the electric motor to a linear motion of the screw shaft, and is accommodated in the actuator case; and a resilient member that is compressed when the screw shaft is moved to a side loosening the brake cable, wherein switching between a parking brake state reached by pulling the brake cable and a parking brake release state reached by loosening the brake cable is performed by a change in a rotational direction of the electric motor, wherein the nut is screwed onto the screw shaft movably in the axial direction within a restricted range, and a movement restricting portion, the movement restricting portion restricts an end of axial movement, toward the side loosening the brake cable, of the screw shaft or of a linked member that moves axially together with the screw shaft by causing the screw shaft or the linked member to abut against the movement restricting portion, wherein the screw shaft is connected to the brake cable so as to be prevented from rotating; and the movement restricting portion is provided in a fixed position in the actuator case; characterized in that the resilient member is interposed between the nut and an insertion member accommodated and fixed in the actuator case so as to be compressed in response to axial movement of the nut after the movement end of the screw shaft or the linked member is restricted by the movement restricting portion when the screw shaft moves axially to the side loosening the brake cable; wherein the movement restricting portion is provided integrally with the insertion member so that the resilient member is interposed between the movement restricting portion and the nut.