An electric winch device which is to be mounted on a mobile crane including an operative part for hoisting work to cause the operative part to perform an operation for the hoisting work by winding up or letting out a rope connected to the operative part, the electric winch device comprising: a winch drum having an axis, the winch drum being provided on the mobile crane to be rotatable about the axis and being wound with the rope therearound; a plurality of motors (22, 24) located on one side of the winch drum in an axial direction in which the axis of the winch drum extends, and arranged side by side in a direction perpendicular to the axial direction of the winch drum; a gear mechanism which combines torques output from the plurality of motors (22, 24); and a transmitting part which transmits a resultant of torques combined by the gear mechanism to the winch drum to rotate the winch drum to thereby cause the winch drum to wind up or let out the rope, wherein each of the plurality of motors (22, 24) includes a drive shaft (22b, 24b) connected to the gear mechanism, and a motor main body which rotates the drive shaft (22b, 24b), the gear mechanism and the transmitting part are configured to increase the torque of the drive shaft (22b, 24b) and transmit the increased torque to the winch drum, the electric winch device further comprises a plurality of brakes (30, 32) for each applying a braking force to the corresponding drive shaft (22b, 24b) of each of the plurality of motors (22, 24), characterised in that the gear mechanism includes an outputting member which is configured to be rotated owing to the resultant of torques output from the plurality of motors (22, 24), and the transmitting part includes a speed reducer which causes the winch drum to rotate at a lower rotational speed than a rotational speed of the outputting member, the speed reducer being arranged in the inside of the drum body. a winch drum having an axis, the winch drum being provided on the mobile crane to be rotatable about the axis and being wound with the rope therearound; a plurality of motors (22, 24) located on one side of the winch drum in an axial direction in which the axis of the winch drum extends, and arranged side by side in a direction perpendicular to the axial direction of the winch drum; a gear mechanism which combines torques output from the plurality of motors (22, 24); and a transmitting part which transmits a resultant of torques combined by the gear mechanism to the winch drum to rotate the winch drum to thereby cause the winch drum to wind up or let out the rope, wherein each of the plurality of motors (22, 24) includes a drive shaft (22b, 24b) connected to the gear mechanism, and a motor main body which rotates the drive shaft (22b, 24b), the gear mechanism and the transmitting part are configured to increase the torque of the drive shaft (22b, 24b) and transmit the increased torque to the winch drum, the electric winch device further comprises a plurality of brakes (30, 32) for each applying a braking force to the corresponding drive shaft (22b, 24b) of each of the plurality of motors (22, 24), characterised in that the gear mechanism includes an outputting member which is configured to be rotated owing to the resultant of torques output from the plurality of motors (22, 24), and the transmitting part includes a speed reducer which causes the winch drum to rotate at a lower rotational speed than a rotational speed of the outputting member, the speed reducer being arranged in the inside of the drum body.