Steering control device for working vehicle

A steering control device for a working vehicle including:

• an electric motor device that generates an assistance torque to a steering column of a steering mechanism for a working vehicle, and
• an inverter that supplies a current for driving said electric motor device based upon a command value of said assistance torque, characterized in that:
• the steering control device for the working vehicle including:
• a load torque sensor that is attached between said electric motor device and a load portion of said steering mechanism to detect a load torque applied on a steering system;
• a steering load torque calculating section that calculates a steering load torque based upon an output value of said load torque sensor;
• and
• an assistance torque calculating section that adds the steering load torque outputted from said steering load torque calculating section and a target steering torque input from an exterior to calculate an assistance torque to command said electric motor device and command said inverter.